Nick Reiner was apprehended on Monday on suspicion of murdering his parents, Rob Reiner and Michele Reiner, in the family’s Brentwood home on Sunday. He had checked in at a hotel early Sunday morning after arguing with his father at a Christmas party. What hotel staff found in his room made them call the police.

Police officers responded to Rob and Michele Reiner’s Brentwood, Los Angeles home at around 3:40 p.m. on Sunday. The couple was pronounced dead on the scene.

Later that evening, their son, Nick Reiner, 32, was found in South LA, near USC, and is being held on suspicion of murdering his parents. The arrest took place at around 9:15 p.m.

“Our hearts go out to the family and friends of the Reiners,” Los Angeles Police Chief Jim McDonnell said at a news conference Monday, calling the situation “a tragic incident.”

Exactly what has happened and why is still unclear. However, several news outlets report that Rob and Nick got into an argument at Conan O’Brien’s Christmas party on Sunday evening.

Nick Reiner checked into a hotel the night before his parents were murdered
Rob Reiner and his 32-year-old son reportedly had a “very loud argument.” Nick has cycled in and out of rehab centers as he’s used drugs for years, as well as being homeless.

Per the NY Post, he’s been to rehab at least 17 times since the age of 15. The news outlet also reported that Nick was possibly back on drugs, and that the argument was about his refusing another stint at a treatment facility.

“Nick was supposedly off drugs,” but then talk surfaced that he was “not so much off them,’’ a neighbor told the NY Post. He explained that it was Rob Reiner’s son’s lowest point over the years was when he was “badly addicted to a combo of opiates and heroin.”

Shower “full of blood” in Nick Reiner’s hotel room: report
After the Christmas party, Nick left and decided to check into a hotel. Per TMZ, he checked into The Pierside Santa Monica at 4 a.m. early Sunday. He used his credit card to check in, but he never checked out.

TMZ cited an eyewitness who was Nick Reiner checking into the hotel. They said he seemed “tweaked out,” but showed no signs of having been in a violent confrontation.

He had no blood stains or cuts on his body, per TMZ. However, on Sunday morning, staff made a shocking discovery as they reportedly found the shower “full of blood” and blood on the bend. Moreover, the window was covered by bed sheets.

On Monday, LAPD Robbery-Homicide detectives were at the hotel to gather evidence and also interview employees.

Rest in peace, Rob and Michele.