I dunno man ... I'm 20 min in .. it's tragic, but most people with dementia like that don't get insanely violent ... seems like they trusted his wife who said she was worried, but didn't think he'd harm her ... no one sees this kinda stuff coming.

When I was in University, this fucker I graduated with murdered both of his parents with a shotgun and cut them up with a chainsaw. He was always kinda an asshole; most likely to end up a frat boy .. but no one saw this coming:

https://www.chattanoogan.com/2004/12/10/59715/Badowski-Says-Killed-Parents-Because.aspx