Rob Reiner’s staff were reportedly told to follow one important rule while dealing with his troubled son Nick.

Reiner and his wife, Michele Singer Reiner, were found murdered in their Brentwood, LA home on Sunday, December 14. The shocking abruptness and manner of their deaths have stunned Hollywood and indeed the entertainment industry as a whole, particularly since harrowing details emerged.

It was confirmed last week that the Reiners‘ son, Nick, had been arrested soon after the slayings and charged with two counts of first-degree murder.

Romy Reiner, Rob and Michele’s youngest daughter, discovered her father’s body at around 3:40 p.m. on December 14 after a massage therapist had failed to gain access to the property.

“She didn’t see Nick when she found her parents,” a source told The New York Post. “She called out his name as she knew he was the only other person there the night before.”

Nick, who reportedly had a long history of mental health issues and alleged substance abuse, lived in the guesthouse at his parents’ home. He was arrested the same day their bodies were found.

After allegedly slitting his parents’ throats, the 32-year-old is said to have checked into a Santa Monica hotel where staff later discovered a room soaked in blood.

A close friend of the Reiners last week recalled an incident when Nick was 11 that should have served as a warning for the future. Indeed, by all accounts the Reiners knew their son “needed more attention” growing up. “He would throw fits,” one source said.

“He was a very hyper little boy. They always had to keep an extra eye on him,” the aforementioned insider added, explaining that the family and their staff operated under a kind of unspoken rule: “‘Give him what he wants.’”

As an adult, Nick allegedly struggled with drugs, experiencing at least 18 stints in rehab, as well as periods of homelessness.

New reports claim the 32-year-old was diagnosed with schizophrenia just weeks before the murders, and his medication change remade him “erratic and dangerous.” A source said: “Nick was out of his head.”

Having been charged with the murders of his parents, Nick this week appeared in court wearing a blue suicide vest. He did not enter a plea and only said, “Yes, your honour,” when asked if he waived his right to a speedy arraignment.