Gosh, this is sad to hear. According to a new insider, Rob and Michele Reiner were warned not to let their son Nick live with them while he was experiencing erratic behavior! As Perezcious readers know, Nick was reportedly being treated for schizophrenia and had struggled with addiction for many years. Shortly before his parents' killings, doctors allegedly switched up his medication, which reportedly made his behavior even worse. He was prone to outbursts and lashing out, including destroying the guest home he was living in at his parents' residence.