Nick Reiner reportedly suffered a major mental health setback in the weeks leading up to his parents' murders... and it's reportedly due to a change in his medication. In a new documentary airing on Friday titled TMZ Investigates: The Reiner Murders: What Really Happened, sources with direct knowledge talk about Nick's schizoaffective disorder diagnosis in 2020. According to the Mayo Clinic, the disorder is "marked by a mix of schizophrenia symptoms, such as hallucinations and delusions, and mood disorder symptoms, such as depression, mania and a milder form of mania called hypomania.