^ Hmmm. That's kinda odd. Cops usually don't brutalize women even under extreme circumstances.
It's hard to say what would make someone flip out after being relatively "normal" for a long time. I don't know if alcohol could cause it but maybe it could. I have met people who were obviously alcoholics who were also absolutely insane. Though that doesn't necessarily mean the alcohol caused it.
But any kind of brain injury seems like it can cause extreme personality changes. There are so many things you really can't know if you only know what's public. Like a suicide attempt could totally cause brain damage and you'd never know what caused it unless you knew about the attempt. Or even if someone fell and hit their head in the bathroom and didn't tell anyone. Just never know.
There's also all kinds of drugs that could probably really mess someone up if they already had that tendency.
"Dusting is a good example of the futility of trying to put things right. As soon as you dust, the fact of your next dusting has already been established." - Carlin
"They flutter behind you your possible pasts
Some bright-eyed and crazy, some frightened and lost
A warning to anyone still in command
Of their possible future, to take care." - Pink Floyd