Maine mass shooter's brain tissue showed signs of traumatic injury but not CTE

Tissue samples from the brain of the perpetrator behind a shooting rampage that took place in Lewiston, Maine, have shown evidence of traumatic brain injury but not the neurological disorder CTE, according to experts. The shooter, a 40-year-old US Army reservist and certified firearms instructor, had been hospitalized and ordered to undergo a psychiatric evaluation prior to the incident. The investigation found that he had been exposed to multiple low-level blasts during his time at an Army hand grenade training range. These findings shed light on the role of brain injury in the shooter’s behavior.