1. Domestic terrorism is ‘metastasizing’ across the country, FBI director says in Capitol riot testimony: FBI Director Christopher Wray says there's no question violent white supremacy is behind most of domestic terror attacks in the U.S;Fisher,2021
2. Multiple homicide: Patterns of serial and mass murder;Fox;Crime and Justice,1998
3. Offender and offense characteristics of a nonrandom sample of adolescent mass murderers;Gray;Journal of the American Academy of Child and Adolescent Psychiatry,2001
4. Offender and offense characteristics of a nonrandom sample of mass murderers;Hempel;The Journal of the American Academy of Psychiatry and the Law,1999
5. Serial murderers and their victims;Hickey,1991