Josh Mankiewicz

The Semantilles knew him from the gym they belonged to, where they sometimes played racquetball. So Rob came to the Cementilli home to pay his respects. He didn't stay very long. And Morella remembers he made everyone feel uncomfortable, including Monica's mom.

The Semantilles knew him from the gym they belonged to, where they sometimes played racquetball. So Rob came to the Cementilli home to pay his respects. He didn't stay very long. And Morella remembers he made everyone feel uncomfortable, including Monica's mom.

Like this is some guy like jumping in to take advantage. What? The body's barely cold.

Like this is some guy like jumping in to take advantage. What? The body's barely cold.

And now Monica's the heir to whatever money he has and the house and, you know, everything that goes with that. I thought, yeah, that's probably what's happening here. Perhaps Mirella was right. And while Fabio's family worried about Monica, detectives had something else on their minds. A phone call police received from a homeowner who lived just a few miles from the crime scene.

And now Monica's the heir to whatever money he has and the house and, you know, everything that goes with that. I thought, yeah, that's probably what's happening here. Perhaps Mirella was right. And while Fabio's family worried about Monica, detectives had something else on their minds. A phone call police received from a homeowner who lived just a few miles from the crime scene.

Across the street, detectives found another camera.

Across the street, detectives found another camera.

And that comes back to Fabio. So presumably the driver stepped in Fabio's blood and then got in the car. Exactly. There was also blood found on the driver's side door panel, on the seat controls and the steering wheel. And that blood did not belong to Fabio. Well, if that's not Fabio, maybe that's your killer. Exactly.

And that comes back to Fabio. So presumably the driver stepped in Fabio's blood and then got in the car. Exactly. There was also blood found on the driver's side door panel, on the seat controls and the steering wheel. And that blood did not belong to Fabio. Well, if that's not Fabio, maybe that's your killer. Exactly.

Detectives were able to get a DNA profile from that blood sample. They uploaded it to see if it matched anyone in the system. How often when you submit a blood sample do you get a hit back from CODIS?

Detectives were able to get a DNA profile from that blood sample. They uploaded it to see if it matched anyone in the system. How often when you submit a blood sample do you get a hit back from CODIS?

Would luck, or maybe science, be on their side? Days were going by, and still no one had been arrested for Fabio Semantelli's murder. His son Luigi was hoping it would not take long.

Would luck, or maybe science, be on their side? Days were going by, and still no one had been arrested for Fabio Semantelli's murder. His son Luigi was hoping it would not take long.

LAPD detectives were certain they had their killers on camera, arriving on foot, and then leaving the scene in Fabio's Porsche, which was the most valuable item taken from the Cementilli home. Brutal, violent burglars. Except, as detectives took a closer look, only part of that was making sense. For starters, Fabio's Porsche was abandoned, and it was not stripped for parts.

LAPD detectives were certain they had their killers on camera, arriving on foot, and then leaving the scene in Fabio's Porsche, which was the most valuable item taken from the Cementilli home. Brutal, violent burglars. Except, as detectives took a closer look, only part of that was making sense. For starters, Fabio's Porsche was abandoned, and it was not stripped for parts.

Then, there was Fabio's watch. still on his wrist. If you're going to take a Porsche, you're going to take a Rolex, if you're a thief.

Then, there was Fabio's watch. still on his wrist. If you're going to take a Porsche, you're going to take a Rolex, if you're a thief.

According to the time-stamped security camera video, the burglars would have had about 30 minutes to go through the Sementilli home. Burglars would ransack the entire house because you never know where the jewelry or other valuables are going to be.

According to the time-stamped security camera video, the burglars would have had about 30 minutes to go through the Sementilli home. Burglars would ransack the entire house because you never know where the jewelry or other valuables are going to be.