By Melissa Hogenboom
Men who kill their families can be separated into four distinct types.
British criminologists have made the assessment after studying newspaper records of “family annihilator” events over the period from 1980 to 2012.
A family break-up was the most common trigger, followed by financial difficulties and honour killings.
Writing in the Howard Journal of Criminal Justice, the team lists the four types as self-righteous, anomic, disappointed, and paranoid.
Read more on BBC News.