Nick Reiner believes he's a victim of 'conspiracy' while in jail for parents' murders: documentary

As Nick Reiner remains in jail, charged with the murders of his parents, Rob and Michele Reiner, a new documentary is exploring what could have contributed to the crimes.

"TMZ Investigates: The Reiner Murders: What Really Happened" discusses how Nick's mental health diagnosis and drug addiction potentially led to the murders of Rob and Michele.

According to the documentary, Nick was aware of his alleged actions at the time of the murders, "but he doesn't understand why he's in jail."

"Sources...