RT Article T1 Shooting alone: The pre-attack experiences and behaviors of U.S. solo mass murderers JF Journal of forensic sciences VO 62 IS 3 SP 710 OP 714 A1 Gill, Paul A2 Corner, Emily A2 Horgan, John A2 Silver, James LA English YR 2017 UL https://krimdok.uni-tuebingen.de/Record/1912703149 DO 10.1111/1556-4029.13330