Are Mass Killings Contagious?
The Huffington Post UK - 07/24/2012
Random shooting of strangers in public spaces by a lone gunman might dominate the headlines, but, (anti-gun-control lobby in the USA please note) other kinds of mass killing are actually more common. Disaffected employees who return to shoot the boss and co-workers after being sacked, alienated husbands who slay entire families before turning the gun on themselves, robbers who wipe out witnesses, and racists who target immigrants, are all more frequent statistically.
James Alan Fox, a Professor of Criminal Justice, and Jack Levin, Professor of Sociology & Criminology, both at Northeastern University, Boston came up with one of the most definitive typologies of the phenomenon.