(AP) — Rob Reiner’s younger son, Nick Reiner, is in police custody for what investigators believe was the fatal stabbing of the director-actor and his wife at their Los Angeles home a day earlier, police said.

Police Chief Jim McDonnell said Nick Reiner, 32, has been “booked for murder” and is being held on $4 million bail in connection with the deaths of his parents.

McDonnell said the department’s robbery and homicide division is handling the investigation.

Nick Reiner has spoken publicly of his struggles with addiction and homelessness. He and his father collaborated on a semi-autobiographical 2016 film, “Being Charlie,” that included elements of their relationship and experience.