A police officer blocks off a street near Rob Reiner’s residence Sunday in the Brentwood section of Los Angeles. Credit: Ethan Swope / AP

Nick Reiner, the son of director and writer Rob Reiner and producer and photographer Michele Singer, once lived on Maine’s streets as he battled addiction.

The younger Reiner was arrested after his parents were found reportedly stabbed to death in their Los Angeles home Sunday, according to The Associated Press. He was being held on $4 million bond Monday, though it’s not yet known what charges he faces.

Nick Reiner, 32, has struggled with addiction since his early teens. He eventually began to repair his relationship with his parents a decade ago when he co-wrote a movie about his struggles, “Being Charlie,” which his father directed in 2015.

“I was homeless in Maine. I was homeless in New Jersey. I was homeless in Texas,” Nick Reiner told People magazine in 2016. “I spent nights on the street. I spent weeks on the street. It was not fun.”

His parents later regretted how they handled Nick Reiner’s addiction, telling People magazine that they often heeded the word of “experts” over their own son.

“At the end of the day, I know my child better than an expert does and I probably should have trusted my own instinct and that’s one of the things I did learn about the whole experience,” Rob Reiner told People.

Rob Reiner was the son of comedy giant Carl Reiner. He went on to direct a string of popular movies in the 1980s and 1990s, including “The Princess Bride,” “When Harry Met Sally…” and two Stephen King adaptations, “Stand by Me” and “Misery.”

Reiner met Singer, then a photographer, on the set of “When Harry Met Sally…” and they went on to have three kids: Nick, Jake and Romy.