Nick Reiner, who is charged in connection to the murders of his parents Rob Reiner and Michele Singer Reiner, reportedly doesn’t understand why he is behind bars.

According to a Friday, January 9, TMZ report, the 32-year-old is delusional. The outlet previously reported that Nick — who has long lived with substance abuse issues — was diagnosed with schizophrenia and that a change to his medication allegedly led to a mental breakdown.

Sources have spoken to the outlet for the documentary TMZ Investigates The Reiner Murders: What Really Happened, airing Friday on Fox and dropping Saturday on Hulu, and claimed his medication is still not working properly.

PMA/AdMedia Newscom/Mega Agency
The legendary Hollywood director, 78, and his wife, 70, were found with fatal stab wounds in their Los Angeles home on December 14. Prior to their killings, the Reiners reportedly attended a holiday party at the home of Conan O’Brien, and it is believed Rob engaged in an argument with his son.

After the Reiners were found dead in their home, Nick was located and arrested by police hours later at approximately 9:15 p.m. local time near the University of Southern California campus.

He was initially represented by high-profile attorney Alan Jackson, but during a Wednesday, January 7, court appearance, Jackson withdrew from the case. Nick was then appointed a public defender, and his arraignment was postponed to February 23.

Instagram/Michele Reiner
Nick has not yet entered a plea.

On January 7, Jackson also reiterated his belief in his former client’s innocence. “What we’ve learned and you can take this to the bank, is that pursuant to the laws of this state, Nick Reiner is not guilty of murder,” he said. “Print that. We wish him the very very best moving forward.”

Rob and Michele, who also share children Jake, 34, and Romy, 28, met working together on When Harry Met Sally… before they tied the knot in 1989.