Experts: Mass murderers are hard to predict
The Washington Post - 05/26/2014
Colorado movie theater shooter James Holmes. Sandy Hook school attacker Adam Lanza. And now Elliot Rodger.
All were young loners with no criminal history who went on shooting sprees, leaving devastated families in their wake.
Mass murderers tend to have a history of pent-up frustration and failures, are socially isolated and vengeful, blaming others for their unhappiness, experts say.
“We can point to all the warning signs we missed. But they’re yellow flags. They’re not red flags until blood is spilled,” said James Alan Fox, a criminal justice professor at Northeastern University who has written several books on mass murders.