The Lone-Actor Terrorist and the TRAP-18

  title={The Lone-Actor Terrorist and the TRAP-18},
  author={J. Reid Meloy},
An open source sample of 111 lone-actor terrorists from the United States and Europe were studied through the lens of the Terrorist Radicalization Assessment Protocol (TRAP-18). This investigative template consists of 8 proximal warning behaviors and 10 distal characteristics for active risk management or active monitoring, respectively, by national security threat assessors. Several aspects of criterion validity were tested in this known outcome sample. Seventy percent of the terrorists were… CONTINUE READING