Rob Reiner's son Nick Reiner hired powerhouse attorney Alan Jackson, known for defending Karen Read, to defend him in court, Us Weekly can report. On Tuesday, December 16, Jackson arrived at a Los Angeles court for Nick's arraignment. Nick, 32, has been behind bars, without bond, since his arrest on Sunday, December 14, for the murders of his father, Rob, and mother, Michele Reiner. TMZ confirmed that Jackson took on Nick's case. (Jackson became a household name due to him being instrumental in securing an acquittal for Read, who was accused of murdering her boyfriend, John O'Keefe.) Nick did not appear at the hearing due to him not being "medically cleared" to attend. Jackson spoke outside of the court, telling reporters that Nick may appear for a hearing tomorrow, Wednesday, December 17. Jackson said he did not have any official charging document from prosecutors, nor was one filed with the court. Will Rob Reiner's Son Nick See His Inheritance Following Arrest for Murder? As Us previously reported, Rob and Michele were found inside their $14 million Brentwood mansion with stab wounds. The couple, who wed in 1989, shared three children: Nick, son Jake, 34, and daughter Romy, 28. (The famed director also had an adopted daughter named Tracy, whom he shared with his late ex-wife, Penny Marshall.) TMZ reported that Nick checked into the Pierside Santa Monica hotel at around 4 a.m. on Sunday. He was arrested 15 miles away near USC. Alan Jackson Stuart Cahill/Boston Herald via Getty Images The night before the murders, Rob and Michele attended Conan O'Brien's Christmas party at his home nearby. The couple brought their son Nick to the party. According to reports, the couple was concerned about Nick's behavior and wanted to keep an eye on him. A source told Us that Nick was acting "creepily" at the party. The insider said Rob's son kept going up to guests to ask if they were famous. TMZ reported Nick and Rob got into an argument at the party, which led to Rob and Michele leaving. Nick has been open about his struggles with drug addiction over the years. Rob and Nick worked on a 2016 film, Being Charlie, which was based on Nick's addiction and being homeless for a period of his life. During an interview with People to promote the film, Nick spoke candidly about his past. Rob Reiner's Son Lost Virginity to Sex Worker After Stealing Parents' Money "I was homeless in Maine. I was homeless in New Jersey. I was homeless in Texas," Nick said. "I spent nights on the street. I spent weeks on the street. It was not fun." An insider close to the situation told Us, "Nick's problems have been going on for so long, so while everyone is in a state of shock right now, it's not entirely surprising." The source claimed "a lot of his anger" was directed at Rob and Michele "for many, many years." The insider said the couple did "everything a parent could possibly do to help him." Rob Reiner's Daughter Tracy Speaks Out After Legendary Director's Death The source explained, "It became a cycle of seeking treatment for him, kicking him out, or him leaving the house, him moving back in." "It's been so much of their life. Rob and Michele were honest about their struggles with Nick, and those who spent time with the family saw it firsthand," the source added. "Everyone who knew them and loved them is struggling right now, because it was never a secret." If you or someone you know is struggling with substance abuse, contact the Substance Abuse and Mental Health Services Administration (SAMHSA) National Helpline at 1-800-662-HELP (4357).