Mitzi Roberts

Tonight on Dateline. It was heartbreaking to listen to her trying to save her dad.

There was some money that was unaccounted for.

Monica had said she was missing some costume jewelry.

They took the entire DVR of the system. That would have captured the exterior cameras of the house, people coming and going.

They tried to conceal their faces.

The whole neighborhood says there's cameras.

Yeah, they pulled their hoodies so tight that there's just a little piece of their faces.

No question, because we see the same hooded sweatshirt leaving in the Porsche.

Once forensics get out there and start going through it, then they start finding little tidbits of greatness.

They just called about this car that had been sitting in front of their house for two days. A patrol unit goes out. Once a unit gets out there and checks it, they realize that it's the Porsche, Fabio's Porsche.

We pulled surveillance from the neighborhood and saw the car the night of the murder on January 23rd, pulling up around 9 o'clock at night, parked the car in a single male, walk away from it. Couldn't tell who it was.

Meaning clues that could lead to a killer. There was some blood on the pedal.

Right. And we know the suspect was driving the Porsche because how else would Fabio's blood get on the pedals?

Not all that often. Sometimes you get lucky.

If you're a thief, right.

Right, right, right.

drawers were open, but not like you would expect from individuals that were there to burglarize the place. It was almost like an afterthought, was what it looked like.

Yeah.

And you're going to see a fight. And there was no signs of a fight. This was definitely a coordinated planned attack where they caught Fabio off guard. He didn't have time to even react. They disabled him very quickly and probably, you know, took him out right away.

100%.

This was not about stealing anything.

Right. And there was nobody. There was nobody. People just loved him. They loved his energy. He was very motivating. Just a nice guy, a great father, and a great husband.

Not all that often. A lot of times, you know, what ends up happening is you have to identify a suspect and then ask for a direct comparison. You know, sometimes you get lucky and you do get a CODIS hit, and those are great.

Very quickly, a hit.

He was in the system because he was a felon. He had been in prison and he was a sex registrant.

He actually molested and abused his stepdaughter.

Right. He's the weird guy at the memorial party.

He's met Fabio maybe once or twice, because Monica had Fabio go in for some racquetball. But he doesn't know Fabio, but he's distraught. Monica's almost consoling him. And just, there was a weird vibe. Everybody at the party and the family was like, who is this guy? They just thought it was very strange how close he was, how he was engaging with Monica.

Right.

On his finger.

He's got this job coaching racquetball at L.A. Fitness and runs a league.

It was heartbreaking to listen to her on the phone trying to save her dad.

It was a group of friends from L.A. Fitness. They all liked to play racquetball. It was a group of mostly girls, mostly girlfriends, and the person that ran the league was Robert Baker, and he was kind of part of the friend group.

Go out for drinks, go out for sushi, things like that. Seems innocent. Yes.

No.

The paramedics arrive and they realize, you know, he's been stabbed multiple times.

He was dead when the daughter found him.

The original officers and detectives that responded that day followed sort of a blood trail out through the house.

We have the two lives that Monica is living here. The life that she's portraying to her friends and Fabio's friends, which is, you know, almost daily on Instagram, posting tributes to Fabio.

He was the love of her life, but she's in Vegas, and we have pictures where she's grabbing Robert Baker's crotch, kissing Robert Baker.

There were areas. There was a concentrated area in the master bedroom where there was ransacking.

I see a lot. It's very telling.

An unknown individual all of a sudden comes into frame and enters the passenger side of Monica's truck. It's very brief. He's in there very briefly.

Can't tell. The video is too grainy. Just that it's a solo individual.

Then that individual gets out and Monica then moves her truck closer to the entrance of Target. Then Monica heads into Target. She's in there for about an hour. As she's leaving the Target, she is transfixed to her cell phone. Enough so that she's staring at it so intently that she almost misses the exit to the Target. And then she kind of catches herself and redirects.

The maid came early in the morning, which was important for us as well, because she had cleaned the entire house before she left.

And so, of course, an investigator, why is she so glued to this phone?

There was a huge amount of data that was cycling through her phone.

Yes, I do.

Right. Either that or it was worth the risk to her. Like, she didn't consider her daughter enough that it was worth the risk.

So there was obviously, to us, that means attempts to clean up some of the crime scene.

When you get to the garage, it's obvious that Fabio Cimentelli's Porsche had been taken.

It was a used car, but it was new to him, and it was his dream car. He always wanted one. He had purchased it, maybe had it for about a month.

to try and figure out if there were any individuals that not only Baker was talking to, but Monica as well, and at the same time.

There was one message via Facebook Messenger, which was just a few days after the murder.

All it said was, download WhatsApp.

No question. This was definitely a coordinated, planned attack. Probably took him out right away.

I wrote a series of search warrants for airline manifests. And the last one I wrote, I just asked for any records for Christopher Austin that he flew between basically the day before the murder and after. And bam, I get a hit. He was on an Alaskan Airlines flight.

We found a citation where Austin was actually cited in the vehicle that they rented to commit the crime, to drive to the crime scene.

Exactly. Tale as old as time.

It just so happened at the time that there was a series of burglaries in the area, and they were dubbed the knock-knock burglaries. And basically it was people go up to your door and knock on the door to figure out if you're home or not. If you answer the door, then they go away and just wait for you to leave, or if you don't answer the door, then obviously they break in.