That article is weird. People with mental health problems are far more likely to be the victims of violence than the perpetrators of violence. It says "Acute psychosis is linked with an increased risk of violence, which is at least doubled in schizophrenia compared to that seen in normal people " - well, use of the word "normal" there is pretty offensive, and there's no indication of the actual risk. If 1 in 10,000 "normal" people are at risk of violence then doubling that takes us to 2 in 10,000 people with psychotic illness at risk of violence. Pretty good odds. What the US needs is much better medical treatment for people with mental health problems. This means early intervention; crisis and home treatment teams; teams for seldom heard and hard to engage people; etc. These are expensive. But dealing with the fallout of non-productive mad people is a lot more expensive.