Got any studies that show this association?
Violent behavior is learned, and emulated. Change their environments so they are less likely to resort to violent behavior just to get by.
Seriously the American prison system is fucking retarded, its not really a great mystery why there are so many re-offenders.
It's not a solution at all, it costs money to give them drugs, and there is no solid evidence to suggest those drugs will lower violent behavior. And if that is the goal, why try to lower their testosterone, which probably won't have much of a notable outcome at all? Why not just pump them full of sedatives?
Because that would be cruel and unusual punishment?