Rob Reiner's Son Nick Caught Calmly Walking Near Film Director's Home Within Hours of His Parents' Brutal Murders

Rob Reiner's son Nick was seen calmly walking near his parents' Brentwood, Calif., home within hours of allegedly murdering his mom and dad.

In newly released surveillance footage, the troubled drug addict, 32, was captured on camera strolling past a gas station just before midnight on Saturday, December 13.

The video, obtained by The New York Post, featured Nick in jeans, a long-sleeved shirt and a hat, as he carried a backpack over his shoulder and walked in the opposite direction of both the security camera and the Reiners' Los Angeles home.

The gas station where Nick was caught on film is located just blocked away from Rob and his wife Michele Singer Reiner's Southern California mansion — where their son was accused of taking a knife to their throats and killing the couple during the "early morning hours" of Sunday, December 14.

Hours after his neighborhood stroll and allegedly murdering his mom and dad, Nick reportedly checked into The Pierside Santa Monica at approximately 4:15 a.m. on Sunday using his own credit card.

Hotel staffers didn't notice any signs of blood or cuts on Nick's body, however, they later discovered the shower inside of his room "full of blood," according to TMZ. Blood stains were also said to have been found on the bed, with sheets covering the room's windows.

Eyewitnesses at the hotel claimed Nick looked "tweaked out" while checking in and allegedly purchasing four Heineken beers and a bottle of water inside of the lobby shop.

The beers were supposedly nonalcoholic, though it's unclear if Nick, who appeared to be high on some sort of stimulant, knew the drinks were substance-free.

While Nick was taken into police custody by Sunday evening, a Los Angeles Police Department Robbery-Homicide detective arrived at the Santa Monica hotel at the hotel around 1 a.m. on Monday, December 15, looking for a murder weapon, blood or other evidence linked to Rob and Michele's brutal murders.

A law enforcement source told the news outlet the detective informed the front desk receptionist he needed to investigate the room where Nick had stayed in, expressing concern that the mentally-ill screenwriter may have "cleaned up" and "disposed of evidence connected to a high-profile crime.

The investigator was then informed of Nick's hotel room number, 207, and proceeded to do a search of the room while immediately taping it off as an active crime scene. The entire second floor has also been sealed off by LAPD amid an ongoing investigation into Rob and Michele's tragic deaths.

As OK! previously reported, Nick was formally charged on Tuesday, December 16, with two counts of first-degree murder in connection with the deaths of his parents. He faces an additional special allegation of using a dangerous and deadly weapon — a knife — to kill his mom and dad.

Rob and Michele were reportedly found in bed with their throats slit at around 3:30 p.m. on Sunday after their daughter Romy received a call from a massage therapist — who informed her the Reiners were not responding or opening the gate of their Brentwood mansion for a scheduled appointment.