There is a difference between psychosis and criminal minded. Mental illness is really an ill-defined term.
An old fashioned term comes to mind - criminally insane.
The one that is replacing it in psych units is "behavioral health." I have my own theory on that one, and it ain't a positive.
Yeah I got called on that one, seems they have to commit a crime first to attain that title.
How about "homicidal maniac"?