Reportedly killed by their son, who had struggled with addiction: https://people.com/rob-reiner-wife-michele-were-killed-by-so...
> In a 2016 interview with PEOPLE, Nick spoke about his years-long struggle with drug addiction, which began in his early teens and eventually left him living on the streets. He said he cycled in and out of rehab beginning around age 15, but as his addiction escalated, he drifted farther from home and spent significant stretches homeless in multiple states.
Rob Reiner directed a movie from a semi-autobiographical script his son co-wrote a few years ago. Hard to imagine many things worse than going through the pain of having a kid who seemed lost, getting him back, and then whatever must have been going on more recently that apparently led to this.
So far AFAIK this claim isn’t repeated by any reputable publishers. E.g. Associated Press and LA Times both published 2.5 hours after PEOPLE and did not make this claim.
(tangent) for those of us who had close experiences with addiction in our families, it's so obvious why "give them money" or "give them homes to live in" isn't a solution to homelesness. A close family member owned 3 properties and still was living in the streets by choice because of his addiction which evolved into a full blown paranoid schizophrenia. He almost lost it all but he was forcefully commited into a mental institution and rehab saved his life.