is there a difference between a campus shooting and a hospital bombing?

[HereSince1628]

62. I'd say there's a good probability based on a single known occurrence

He killed himself. Suicide has a strong association with mental illness. About 80 percent of suicides are estimated to co-occur with mental illness.

Mass murders seem to have a significant, but not as strong association. About 60 percent of mass-shootings are associated, post hoc, with symptom that may be consistent with mental illness. But only about 38% of mass murderers are known to have had diagnosed mental illness.

What we get is mostly presumption. The public and law enforcement are simply unable to see such horrendous events as having been done by a person who is mentally well but working toward a deviant criminal objective/goal.

The presumption doesn't do anything to help understand the problem, but that's not the only problem, dead men are very hard to diagnose with mental illness.