Prosecutors seek to introduce evidence Michigan school shooter’s parents created a pathway to violence

Mass shooters have “a slow build towards violence over time and they give up a lot of warning signs,” a forensic psychologist testified Friday at a pretrial hearing for the parents of Michigan school shooter suspect Ethan Crumbley.

​Mass shooters have “a slow build towards violence over time and they give up a lot of warning signs,” a forensic psychologist testified Friday at a pretrial hearing for the parents of Michigan school shooter suspect Ethan Crumbley.