Josh Mankiewicz

And while Rob was at the house, leaning into Monica, friends saw something.

And while Rob was at the house, leaning into Monica, friends saw something.

That bandage, plus Rob's affinity for all things Monica, was enough for the friends to document that.

That bandage, plus Rob's affinity for all things Monica, was enough for the friends to document that.

Those photos were shared with detectives, who at first didn't seem to think much of it until Robert Baker's blood ended up matching the blood in Fabio's car. And in that photo, he's got a bandage on his hand.

Those photos were shared with detectives, who at first didn't seem to think much of it until Robert Baker's blood ended up matching the blood in Fabio's car. And in that photo, he's got a bandage on his hand.

A finger on his left hand, which would be right in the area of the bloodstain that you found in the Porsche.

A finger on his left hand, which would be right in the area of the bloodstain that you found in the Porsche.

Baker's blood was also found inside the Cementilli home and on that bottle of vinegar left in the sink. As detectives excavated Baker's past, they found a diverse resume. He was a 54-year-old Army veteran who served as a staff sergeant and recruiter for more than a decade.

Baker's blood was also found inside the Cementilli home and on that bottle of vinegar left in the sink. As detectives excavated Baker's past, they found a diverse resume. He was a 54-year-old Army veteran who served as a staff sergeant and recruiter for more than a decade.

And there was this professional detour. He's upstairs. I know. a nearly 20-year career in the adult entertainment business. Baker both acted in X-rated movies and also managed other performers. By 2017, he was a registered sex offender because of that previous conviction and was working at the gym, where Monica was an active member.

And there was this professional detour. He's upstairs. I know. a nearly 20-year career in the adult entertainment business. Baker both acted in X-rated movies and also managed other performers. By 2017, he was a registered sex offender because of that previous conviction and was working at the gym, where Monica was an active member.

Investigators had more than enough evidence to arrest Rob Baker. Instead, they left him alone and decided to return to the Cementilli home and speak again with Monica, who was still living at the scene of the crime. What they really wanted to learn more about was her racquetball instructor. Detectives decided to avoid any mention of the DNA hit.

Investigators had more than enough evidence to arrest Rob Baker. Instead, they left him alone and decided to return to the Cementilli home and speak again with Monica, who was still living at the scene of the crime. What they really wanted to learn more about was her racquetball instructor. Detectives decided to avoid any mention of the DNA hit.

Instead, they talked about the day of the murder, and Monica recounted how she spoke with her daughter Isabella before heading home after shopping.

Instead, they talked about the day of the murder, and Monica recounted how she spoke with her daughter Isabella before heading home after shopping.

The detectives and Monica walked through the house, as Monica again pointed out the items she was missing.

The detectives and Monica walked through the house, as Monica again pointed out the items she was missing.

Detectives did not reveal why they had already moved past the burglary theory. In fact, they suggested just the opposite. What detectives really wanted to know was more about Monica's gym pals.

Detectives did not reveal why they had already moved past the burglary theory. In fact, they suggested just the opposite. What detectives really wanted to know was more about Monica's gym pals.