Gone

>> As a mother, Michelle was awesome.

I called her the picture girl.

“Pictures, pictures, pictures, she looked like a million dollars.”

Where are high heels and carry a baby on her hip? When she was a child, it was hard not to have a close friend relationship with her even though I had to be the mom. >> A woman has vanished from her Houston apartment, her family and friends are fearing the worst. >> I got the phone call from my son and David said something's wrong.

>> The Thorntisate Warner's estranged boyfriend claim she stormed out of the apartment following an argument. >> Mark Castelano was Michelle's boyfriend for a while. Mark and Michelle did meet at work. >> She captivates her and she walks in. >> That part about her is completely true, she mesmerizes people.

>> They had a son together who was Caden.

Michelle was living with Mark the night she disappeared. We called the police. Everyone was searching. >> We don't have a scene, we don't have a witness, we don't have evidence, we don't have a body. >> The more we thought about it, we kind of look to each other and said, let's go back and let's search.

[MUSIC]

“>> So will you explain to me how you use the iPhone and FaceTime?”

>> They tried to follow it like a treasure map. >> Like that kind of thing, right? >> Correct. >> Well, it was in real time. >> So you were FaceTime?

>> FaceTime? >> Yes. [MUSIC] >> So it's like I'm aiming at this tree here and you say, why go to the right of the tree or is it more to the left of the tree, that kind of thing?

>> Correct, exactly what I'm looking at right now. >> A week went by, Michelle was still missing. We heard about Dr. Phil and Mark Castellano was going on his show. >> Today, we will take you inside a national news story as it unfolded in front of our cameras in real time. >> Mark was going to be on Dr. Phil.

“When he said he wanted to talk with you, what'd you do?”

>> I got on the airplane, flew to Odessa and there was a woman missing and like everybody else. We wanted to help find her. [MUSIC] >> I'm staying strong from my son. I cry every once in a while, but you're hurting inside.

>> Yes, hurting inside, it's killing me. >> Friends describe her as bubbly. Those same people describe you as psychotic. >> Well, they don't like me too much. She has to be alive, I'm sorry, she does.

She has to be out there. >> If she is watching this right now, which she can come home and she-- >> She, we can fix this. >> It was the worst week of my life, Michelle was just gone. [MUSIC]

>> I'm Tracy Smith, tonight on 48 hours. [MUSIC] [MUSIC] >> It's just about a 45-minute drive from the refineries of the Texas coast to the high rises of downtown Houston, and in 2000, 20-year-old Michelle Warner

moved to the big city. She was a new mom looking to make a fresh start. [MUSIC]

>> Michelle did have the small town girl in her, but Michelle always

desired to go to the big city. >> Donna Malone is Michelle's mom. She loved to talk to people, she never met a stranger. >> We were really, really close when we were young kids, I mean really close. >> Her brother, David.

>> From the time of a newborn, we did pretty much everything again. I was her child, not theirs. >> She just grew into this beautiful swan, you know, and she had the long, pretty hair. And a beautiful smile. She started going to college and started studying criminal justice.

>> But things didn't exactly work out. Michelle may have been a saint, but she was also a sinner. She married right after high school in 2001 and had a daughter, Haley. >> When that marriage went south in 2003, little Haley went to live with the ex-husband. And Michelle was on her own.

>> Michelle was a great mom, but she ran into some tough times in her life. >> She fell in with a bad crowd, she even disappeared a couple of times. And she was arrested for possession of cocaine. But that was eight years ago, and her family says, Michelle's dark days were behind her.

She was going to work every day.

“>> In 2008, she also began a relationship with a man she met at work.”

A man named Mark Costilano. >> My impression of Mark from the very beginning was, what an odd duck. What a strange little man. >> Mark Costilano and Michelle had met on the job. She was a secretary at a medical firm.

He was the IT guy, you know, the person who fixed computers. >> I absolutely do not know what Michelle saw in Mark.

>> He's always been, you know, a little off.

>> In 2009, Michelle and Mark had a son, Caden, but Donna says, Mark Costilano wasn't much of a dad. >> Caden was about two months old and Mark just went away. Just I can't handle this. It's too stressful for me.

Everything was always about me, me, me, me, me, me. >> In those early days, life was tough for Michelle as a single mom, bouncing from job to job. >> No child support, he did not pay any child support. Michelle was doing it on her own, struggling to do it on her own.

It was very difficult for her. >> Then, in the summer of 2012, she got a break. A new job at a law firm in Houston. All she needed was a place for her and Caden, now three years old, to stay.

She reached out to the one person she knew there.

Mark Costilano. He agreed to let them stay at his Houston apartment, but Michelle set down some rules. >> When Michelle moved back in with Mark, the agreement between them was that they would live together,

raise the child together, but not as a romantically involved couple. >> But just three months after moving in with Costilano, on Saturday, September 22nd, 2012, Michelle was gone. >> A woman has vanished from her Houston apartment. >> Their family and friends are fearing the worst.

>> When Michelle's brother David couldn't get a hold of his sister, he called Costilano and confronted him. >> Do you have any idea of where she may be? You're the last person I know of, it's actually seen her. >> Yeah, yeah, I am.

I am, but I don't know where else she went.

>> Costilano told David that he and Michelle had had a fight. She walked out and left her car and her toddler behind. David was surprised to learn on the night Michelle disappeared, Costilano took Michelle's car and drove Caden more than 500 miles over eight hours to his parents' house in West Texas.

>> Mark's story did not make any sense. >> Almost immediately, Michelle's family filed a missing person's report. Five days passed, nothing. That's when Houston homicide detectives got the case.

>> Where are we? >> We are at the apartment complex where Mark and Michelle live together. >> Veteran Houston homicide detectives fill waters and sergeant Brian Harris.

“>> When you first came here, you went in, and what did you do?”

>> Went to the apartment, the family was there. Actually, it was interesting that Mark's story was what happened. You know, I mean, in terms of the story that he was telling everyone. Castilano had told David in that phone call that he and Michelle had been arguing over Caden when she walked out.

>> All of the events leading up to it. The fight, all of that stuff that happened here. >> Accurate happened, at least, what he's telling us. >> The only people in this scenario that are casting any kind of suspicion on Mark, are Michelle's family.

That's where all of that is coming from. And they're not saying things like, you know what? Michelle told me yesterday that if anything ever happened to me, it's Mark. >> They did, you were getting. >> We were getting, we don't like Mark.

It's Mark's a bad guy. And it's more personality dislikes about Mark. >> But back at the apartment, cops did find something strange. >> We knew that Mark was an IT guy. He's a techie nerd.

So then what becomes noticeable in the apartment, there are computers, but all the hard drives you're gone. >> The homicide detectives wanted to talk with Castilano, so they called him at his parents house in West Texas. Turns out, he had an unusual question for them.

>> He said, can I ask you a question though? I need some advice. And I said, sure.

“And he said, do you think I ought to let Dr. Phil interview me?”

>> What'd you say? >> Well, I was a little stunned, I said, Dr. Phil. And I said, absolutely, let Dr. Phil interview you. [ Music ] >> As the week passed, the search from Michelle expanded quickly

from Houston to West Texas all the way here to Los Angeles and the Dr. Phil show. >> Today, we will take you inside a national news story as it unfolded in front of our cameras in real time. >> It was Dr. Phil McGraw, not the police,

disappearance. >> Let's talk about the night she disappeared. >> Okay. >> You had a fight? >> Yes, sir.

“>> And was this a physical fighter and argument or both?”

>> Basically, I come home.

She's in her room. First thing she does is start yelling at me that the Caden has made a big mess. We start fighting. She walks up to me and she gives me this kind of sucker punch while I'm on the floor. I mean, she hits me all the time and I don't retaliate.

But she hit me and said, and clean it up right, X-wave, X-wave, and she goes in and slams her door. >> What was your first impression of him? >> That he was a gameplayer. He thought he was the smartest guy in the room and he wanted everybody to know.

You go back in to resume the argument, exactly. >> Yes. >> And she's gone. >> She's gone. >> I would take her pictures out and say out loud, Michelle,

we're arguing, you know, just call me, text me, please. >> [MUSIC] >> More troubling information in the search for a missing mother. >> No one has heard from Warner in a week. >> Today, we're talking about the story of a beautiful young mother, Michelle Warner,

who went missing after a violent fight with her ex-boyfriend, Mark Castellano. >> From the very beginning, Dr. Phil McGraw felt there was something suspicious about Mark Castellano. >> Why do you think Mark Castellano wanted to come on your show? >> Well, you know, I think this guy is the narcissist. I mean, I really do.

>> She basically owns me in a lot of ways.

And I admit that I cave to Michelle nine tens of the time. >> Castellano was on the defensive. He said to you, she could have just disappeared again. >> That was a possibility. >> He says it was a possibility.

She could have gone into bedroom, locked the door, gone out the door, and left. But her car still there. >> And her son is still there. >> Her son is still there, her car is still there, but she's gone off the grid. >> Meantime in Houston, 500 miles to the east.

The cops were searching the grid, trying to find Michelle. We do something called the psychological autopsy. We start breaking down the person's life.

“And so that's what we're having to do with Michelle.”

>> Back in West Texas, Dr. Phil continued his interview with Castellano. He had a hunch that those missing hard drives might be connected to Michelle's disappearance, so he grilled Mark. >> You said you had shown to me when you had the drives. >> Do you have him here?

>> Yes. >> Can we look at him?

>> Yeah, bring to you one second.

>> No, I don't have him, just how you still have him. >> He's still happy. >> Okay, we can come back. >> Okay, sorry. >> I'm glad you brought him back, but he didn't.

>> You said you were going to show those to us, and you got up and walked to the door and then said, oh, that's right, they're not here. But not 15 minutes before we got here, you told my producer they weren't here. You already knew they weren't here when you got up to go get them.

>> My minus scatterbrain, right now, I mean, I forgot. >> I forgot. >> Bells are going off right now, I'm talking to him, and I'm watching the theater of what's going on. >> What was he doing?

>> You know, he's playing games here. To him, it's a manipulation, and I'm wondering why he's not putting all of his effort, all of his emphasis on finding Michelle. You know, my dad used to say for every rat you see, there's 50, you don't. When he tells you that lie, there's 50 more.

Dr. Phil relentlessly peeled back Castellano's story. >> He also admits throwing her cat down the hallway, throwing her cat into a wall, and that is very troubling to me. >> Each revelation led him closer to the conclusion that Castellano killed Michelle.

>> Was there violence? >> There was violence. >> She and I would wrestle, push each other around. >> There's one time I choked her. >> He admits to being violent with her.

>> He admits to being violent with her to the point of choking her now. Think about this, if he, in fact, is culpable in her disappearance, why in the world would he admit that? >> So let's look at the moment when you ask him the big question. >> It's really odd for a mother to just not check on find out anything about the child.

“If you think something has happened to her, why aren't you looking for her?”

I mean, as far as everybody has exhausted the leads that I have,

I, they, the police are looking for their professionals.

“>> Did you do anything to her that would be considered foul play or criminal?”

>> No, no. >> Did you kill her? >> No, sir. >> So as you left, where did you stand with Marc Castellano? What did you think?

>> It is clear in my mind. I'm not believing a word he is saying. When I walked out the door, I said, he killed her. No doubt about it. >> You said it then.

>> He killed her. >> But Castellano hadn't confessed to anything. After Dr. Phil returned to LA to get his show ready for broadcast, detectives broadcastellano in and turned up the heat. >> This is where it happened, Houston homicide division.

Here in the interview room, it wasn't exactly what you might think. There was no tough guy posturing. No rolled up shirt sleeves, guns on the hip. No raised voices. It was pure psychology.

“>> I was like, Phil, when you go in there, it's like walking into a minefield,”

because one, you don't want to upset him and make a mangrove, where all of a sudden he says the outward lawyer, or he says, I want to leave. >> Detective waters takes the lead.

>> Okay, so the first thing.

>> You're not under arrest. And again, I've told you that I certainly appreciate you coming here, and it's all right. >> Well, I want myself to spend a lot of time here. >> I want Michelle to be found.

That's what Castellano just said. That's his story, and he's sticking to it. >> Have you tried to call her? >> At this point, no, I don't want to call her. >> This was it, this was it.

We had no evidence, we had nothing. >> So all this stuff is going on? >> So detective waters started looking for motive. If Castellano was a killer, did something push him over the edge. >> Pressure's build.

>> The pressure's building on me, yes, got it. >> When she gets mad, she's violent. So hit she, she thinks she has the right to. You know, man has to take up crap. She's the pretty girl, and she gets everything she wants.

So she has that princess attitude. >> Wow. >> That princess attitude phrase was a flag for detectives, an insight into how Castellano viewed the relationship. >> We kind of get a flavor for your relationship.

>> And then this is my impression. Is that when it's good, it's like intensely good. But when it is bad, right, it is intensely bad. >> Detective Waters approach, no tough questions yet. He's trying to get Castellano to trust him.

>> Let's get the last Saturday, the 20 seconds, okay. >> And what's your odds out, slams the door to a room, and about on 1015 this later, I opened the door to say, well, you know what, and Scott? >> She's gone.

>> Once that narrative was complete, and he felt like he had told his story, it was at that point that I'm now going to confront you. >> I need you to explain to me what happened. >> This is a dance.

>> I'm letting Mark play the music. And then at one point, another song comes on, and it's mine. And now the dance changes. >> We both know, we both know. Michelle did not walk out of that apartment.

[MUSIC] >> I don't love her. I'm not in love with her. I mean, I don't want anything to have. I wish Michelle would pop her right now.

>> Yeah, yeah, yeah, yeah. >> When she gets mad, she's violent. I don't care what advice she is. I said something about you. Do you take too many pills?

You can't watch Kate and there's something else. >> Detective Phil Waters sat for hours talking to Mark Castellano, gaining his trust. >> But she was like, I can't tolerate Kate and she was like, I need help with him.

She's like he's driving me nuts.

Waters finally discovered a way to bring out the truth about what happened

that night. You brought up Kate. >> Yes. >> So your concern for Kate and his mainly centered on when Michelle is the primary caregiver.

“>> Kate and was the most important part of his life.”

So I knew that I was going to have to frame whatever he did in that apartment in that context. >> That context getting Castellano to admit his actions that night were to protect Kate and it wasn't about hurting Michelle. It was about the love and the strength of that love that you have

for Kate and protecting him from anybody that would threaten her hurt him and that's what you're going to have to explain now.

>> So I want you to be honest with me and tell me what happened.

>> When he took his glasses off, I went, here it comes. >> You know. >> I just knew it. >> He's a good interest. And she's finishing up.

And she's still yelling and Kate is hiding. I grabbed her and I broke her neck. But there he comes with it. I'm sorry.

“Give me the best penalty that's why I deserve it.”

Look, I'm proud of you.

I'm just like, you're your life's none of the list more.

I'm just a pusher and then grab her. >> But by the time Sergeant Harris came into the room, Castellano seemed to pull himself together and physically demonstrated how he killed Michelle. Castellano claimed Michelle's erratic and abusive behavior pushed him over the edge. >> So Hintie, she thinks she has the right to.

>> He painted this picture of Michelle as an abusive woman. >> Yes. >> When you talked to other people, did they say that she was volatile? She had a temper, she was abusive. >> Everyone we talked to described her as a, not just family members, but has a loving mother.

>> Was there any evidence that Michelle was abusive to Mark?

“Not anything that was documented other than Mark's story.”

>> I'll be right back.

>> After his confession, he was left alone with his phone.

But instead of calling a lawyer, I'm on. >> He called his parents. >> Well, I confess, I did it. >> He called his brother. >> I'm sorry that all of a sudden I put up for a week, but I can't take the guilt anymore.

A friend. >> I don't want to do to know that she's dead. >> He even talked with Dr. Phil's producer. >> There's a moment of rage, I just, I couldn't take it anymore. My producer confessed to everybody, I can think of him.

>> Castellano had also told detective waters what happened moments after he killed Michelle, as he stood over her body, lying on the bed. >> He said that Caden walked in and said, "What's wrong with mommy?" And he turned around and his response was, "Oh, she's taking a nap."

>> He put Caden in a bath and then dragged Michelle's body into the closet. That's when he loaded Caden into Michelle's car and drove through the night over 500 miles to West Texas. He left Caden with his parents, turned around and drove all the way back to Houston back to the apartment where he had left Michelle. >> How did he get her out of the building? >> He packaged her up in a large container, plastic container,

and duct tape her hands and feet, put a bag over her head. He said he explained that he put the bag over her head because he was tired of looking at her. >> With the container loaded in the back seat of Michelle's car, Castellano once again made that long drive back to West Texas. Outside of Midland, he buried Michelle in a shallow grave.

>> It turned out Michelle's body was somewhere out here in these endless West Texas oil fields. Castellano had drawn a map and given police a rough idea of where the grave was, but it wasn't a good enough description.

“The key to finding Michelle's body was as close as an iPhone.”

>> Hi, Sergeant Harris, it's Tracy from 48 where you can see that, right? Harris and Waters stayed in Houston with Castellano, while local police and FBI agents tried to locate Michelle's body with the map, but it only got them in the general vicinity. >> So they call this in the interview room and we decided to try the FaceTime.

>> FaceTime is the Apple iPhone's video phone. You can see in here whatever the person on the other end of the line wants to show you. >> Mark was actually speaking to the detectives and they were holding their phone out. >> Like that kind of saying, right? >> Correct.

And he was able to see, then they did much what we're doing right now. >> Just walking around aiming it. >> Correct, and so they paned in the area and then he told them this stop, and he directed them towards, it was like more of a big scrub brush. >> When they got closer, that's when the FBI agent,

we could hear her say, "I found her. I found her."

>> With the discovery of Michelle's body, Castellano was finally arrested and charged with murder. Eight days after Michelle went missing. >> And an exclusive interview.

“>> Dr. Phil's show went on TV a few days later.”

>> Mom vanishes, the killer confesses. >> Until Mark's confession, Caden had been staying with his relatives, but now authorities moved him in with Michelle's family. With Castellano behind bars, I got the chance to confront him. And what he told us was a brand new version of what happened that night.

[ Music ] >> Hi, Mark. I'm Tracy Smith from CBS News 48 hours. >> From the start. >> Okay, yes, ma'am.

>> Mark Castellano had told everyone. >> She's gone, she's gone, yes sir. >> Lies. >> So we wanted to set the ground rules before our interview.

>> So here's the thing, Mark.

You lied to the cops, you lied to Dr. Phil, you lied to your parents. Why should we believe you now? >> There's no point to lie about anything. I don't like lying, I don't like lying at all, it's not me. I'd rather just go ahead and tell the truth and get it over with.

>> Are you telling me the truth now?

“>> Yes, of course I'm telling you the truth.”

>> The first thing Castellano wanted to tell us. >> We got to fight, it just happened all wrong. >> Was that he was not a murderer? >> It wasn't, you know, not my finest hour. >> Not your finest hour?

>> No, why do you say that? >> Well, I mean, the whole thing wasn't my finest hour. >> He says yes, it was true. The couple had a fight that night, but he was the victim. >> It got violent.

>> Oh yeah, they always get violent, she beats the hell out of me.

That being my disappointment for a long time. >> But this time, Castellano says he'd had enough. >> Remember, there's never been an official report of abuse in this case. >> So did you just snap? >> So to retaliate back from her swinging at me,

I snapped her hit her back. This time I was tired of being hit and yeah, then I was going to defend myself this time around. >> So you threw stuff back and forth and then you grabbed her? >> I didn't grab her yet, she punched you through another punch at me.

>> And then? >> That's when I grabbed her and latched forward. >> This is where Castellano's story changes. >> I grabbed her and I broke her neck. >> I'm sorry.

>> From his confession to the police. >> So I want to go back to this confession. What actually happened that night?

“>> That's what we don't know the top of that.”

>> That's Castellano's lawyer at all. >> Telling him not to reveal all of what happened that night. Still. >> I should have done this, I should have done that. >> He did tell us a few details.

Castellano now says it was all an accident. In the struggle, he says Michelle died when he ended up falling on top of her neck. >> Michelle's death was my fault because I'm the one that fell on her. >> That fell on her. >> Yes, I did fall on her.

She just, I like that. I mean, she was just lifeless and I was saying, you know, her body let go and it was an accident. >> Michelle's mother, Donna Malone, can barely contain her disgust.

>> First of all, I will never believe it was just an accident.

You don't just an accident murder someone and feel nothing. >> You dropped a car and you hit somebody. Did you want to hit them? No, you're like, it was an accident. You might be at someone's house and they just had brand-new carpet put in.

And we even fell with the cake and you dropped it on the floor. Do you want to do it? No, you feel bad about it? Yes, but still accidents are accidents. They're not planned.

That's why they're called accidents. That tear was the only time during our interview that Costalano showed any emotion. >> You liar. Comparing it to spill and cake on someone's floor,

but to murder someone, that's a violent act. >> Did you choke her? >> No, I didn't choke her. >> But you said you were angry. >> I was first.

>> You said you snapped. >> Yeah, to go ahead and actually raise my hands against her. I had a gun. I've always had an 9 millimeter. If I really wanted to kill Michelle or a shot her.

I would have taken my gun a shot her. >> He could just a shot her if he wanted to kill her. Does this nonsense talk? It's nonsense. What did you do with Michelle's body?

>> It stayed in the closet. You know, I looked at her and it was just like, oh my god. So that's when I put the bag over her head and I put her in the closet.

>> Because just her face, the way he was frozen,

I knew I messed up. >> Did it occur to you as you were handling her body, that this was the woman that you loved. This was the mother of your child. >> I did.

It did. I also know I couldn't bring her back. >> Three days later, cost Elano would dump Michelle's lifeless body in that shallow grave.

“How do you feel about misleading people for so long?”

>> Well, it was a tough call. It was a very tough call. I didn't plan on getting away with this. If I had planned on getting away with this, I would have got away with it. >> I feel very angry about the fact that Martin lied to all of us.

He could have just told the truth from the beginning. It was obvious that everyone was on to him. Family, law enforcement, why not just tell the truth. Get it over with.

>> She did attack me first.

>> The more cost Elano talked, the more it seemed he was angry with women. >> I mean, women are now the other replacing men in a lot of aspects. All of her becoming a big time aggressors. Women are now the new aggressors.

“She's beautiful and you're beautiful woman yourself.”

Life's a little easier for women like you because people just can't put bad things with pretty people. >> She sounds like you resent that a little bit, Mark. >> Well, when you sit there and have been told it, when you're not a pretty person, that life's going to suck for you.

>> Mark Costalano's bizarre answers during our jailhouse interview raised more questions about what makes him tick. >> I'd rather just go ahead. >> So we wanted to talk more about it with Dr. Phil. >> I got to say I really screwed myself over the way I confessed everything because

first of all, I didn't really describe everything accurately.

>> And second of all, I didn't really think I was going to everywhere I was going to say it was going to be completely out of context, which it was in a lot of ways. >> He's criticizing the process. Things were taken out of context. Well, here's the context.

Did you kill her or did you not? I think this guy has such an inferiority complex and that's one of the things about narcissism. There's a false sense of superiority, but it's a false sense of superiority.

“>> The truth is, they really feel inferior.”

>> They really feel very inferior, very put upon. And he felt very much that he had reached above his level with Michelle. >> And -- >> That she was out of his league. >> Out of his league, she was way over his head. In this instance, she did not reject him.

He had the ultimate rejection of her. >> What do you think his motive was? >> I think this guy is very hedonistic. I think this relationship was on the downslope. I think it was falling apart.

And I think he felt her slipping away. I think it was one of those situations where if I can't have you, nobody will. >> Come on. >> At his trial, Costalano's attorneys will present his new version of what he says is the truth. >> We the jury will the jury buy it.

>> It was very hard to wait on the trial, we wanted some form of justice for Michelle. We felt that we were building up to this pinnacle that would bring us some sort of peace. May 27th, 2014. Marc Costalano is on trial for the murder of Michelle Warner, the mother of their son, Peyton. >> This is a case about obsession, rage, assistant district attorney, Jamie Raina.

>> And this defendant's calculated attempts to get away with murder. He became so upset with Michelle that he grabbed her by the neck that he started to choke her. He started to squeeze her neck. You'll hear him tell those officers he choked her for one and a half to minutes. >> Take a moment.

>> Educator Phil Waters. >> At the center of the prosecution's case, Marc's own words that videotape confession to detective waters.

So I want you to be honest with me and tell me what happened.

I grabbed her and I broke her neck. Okay.

“>> The state medical examiner testifies Michelle was strangled.”

>> High up in the neck. >> Her highly bone, just beneath her jaw was broken. Marc Costalano does not take the stand. >> Instead, his lawyer Eric Davis presents that very different story. Michelle's death was an accident.

>> She comes out and he grabs her and he's controlling. And he falls down with his weight on hers. And here's the pop. And when he reached out to defend himself to protect himself, he didn't anticipate that she would fall and break her neck. >> I didn't find any real evidence that the throat was disturbed.

An expert for the defense, a forensic engineer, testifies Marc's accident story was a possibility. >> There's no physical evidence that shows any type of squeezing or sideways forces. All of the physical evidence shows is forces applied from the front. >> So what's the detective's reaction to Costalano's defense?

“>> Is that possible that he fell in her and that's how her neck snapped?”

>> No, the problem is, is that you cannot accidentally

strangles someone for a minute and a half to two minutes. >> Show me what you think he did, what he told you he did for Michelle, what did he do? >> He's so mad, he follows her in the bedroom and he goes and whatever takes place, he reaches out and he's just grabbing her for a minute and a half and two, he's grabbing her, grabbing her. And she has nowhere to go.

>> If Costalano thought the jury might take pity on him, prosecutors would present more evidence that shows the actions of a cold, callous killer. Weeks after Marc's confession detectives discovered a chilling piece of surveillance video. >> So that's their apartment right over there and across the way on that building there, there was a camera and that camera showed a shadowy view of the backstairs of Costalano's apartment.

>> So he drags her body and have been down the stairs. >> You see him stop and he is worn himself out, he even says when he's on the phone with people that he's confessing to Michelle again, a lot of weight. So he's really an exercise to bring her down the steps and put her in the car. >> As for those hard drives that seem to be so important in the early days of the investigation,

turns out they weren't relevant to the case.

“>> If you cannot remain composed when the verdicts read, you should step outside at this time.”

>> After more than a week of testimony, 19 witnesses and six hours of deliberations of verdict, ending an anxious weight for Michelle's family. >> If you'd stand please, Mr. Costalano. We the jury find the defendant guilty of murder as charged in the indictment. >> Mark Costalano, guilty in the strangling death of Michelle Warner.

>> I was very pleased with the fact that he was declared guilty and I said, okay, good. They did this quickly. So I believe that this is in the hands and a good solid jury and they'll do the right thing. >> The next day, Michelle's loved ones are back in court for Costalano's sentencing. Ironically, it's also Michelle's birthday.

She would have turned 33. >> Each side will be given 25 minutes to argue their case. >> Mark Costalano's attorney begs her mercy and argues his clients much talked about confession was a show of remorse. >> I'm sorry. >> Crime was sold because of a man's culture. In fact, if Mr. Costalano had kept his mouth shut,

we wouldn't be him, but he did what most criminals don't do. He told it on the side. No matter what he did, he's going to the penitentiary. The question is how long? >> Michelle's family wants to see Costalano receive the harshest penalty, life in prison.

I do not think that he has any sense of remorse. None. I hear nothing but excuses that it was Michelle's fault that he did what he did. And we all have rejoiced and he chose to kill her. >> The jurors spent four hours debating his fate.

>> All right, the juror. >> Finally, a decision.

you're now sentenced to 27 years in the institutional division of the Texas Department.

“>> The sentence feels like a slap in the face for Michelle's family.”

>> One word went through my mind when I heard 27 years, seriously. >> After several months, it's still impossible for the family to understand the jury's decision. >> I don't know what happened in the room while the deliberation was going on,

“because I've not had not won juror come forward and speak to me. I do not feel that I got”

closure from my daughter's death and neither does any of the rest of her family. None of us do. >> Now it is up to Michelle's family to explain to two kids, a daughter living with her ex-husband and little Caden, why their mother is gone.

“>> It's like taking your entire world and flipping it over, you don't expect anything like that”

to ever hit that close to home for you and it's turmoil. >> I miss the laughter that I shared with her and I just miss the conversation. I can't have that anymore and that's very sad, it's very lonely and makes me feel lonely.

So it's an empty hole that will always be there for the rest of my life and that's a hard thing to swallow.

[MUSIC] >> More Castalano's projected release date is in 239. >> Sunday. >> He's going the distance. >> We go. >> It's week two of the NFL on CBS and redemption takes center stage.

First, Drake May and the Patriots host Aaron Rogers and the Steelers.

Then the Chags visit the Broncos while the Raiders face off with the chargers out west. It all kicks off at New Eastern with the NFL today. >> Oh, wow. >> See you someday. >> With the NFL on CBS and streaming on Paramount Plus.