https://pubmed.ncbi.nlm.nih.gov/20004282/
"According to the definition of Hodgins, only 15% of murderers have a major mental disorder (schizophrenia, paranoia, melancholia). Mental disorder increases the risk of homicidal violence by two-fold in men and six-fold in women."
https://www.nytimes.com/2017/11/08/...iatrist,have any severe, diagnosable disorder.
"It is true that severe mental illnesses are found more often among mass murderers. About one in five are likely psychotic or delusional, according to Dr. Michael Stone, a forensic psychiatrist at Columbia University who maintains a database of 350 mass killers going back more than a century. The figure for the general public is closer to 1 percent.
But the rest of these murderers do not have any severe, diagnosable disorder. "