The frantic mom of mass shooter Shane Tamura had repeatedly called 911 on her mentally ill son in the years before he shot up ...

Shane Tamura, the Park Ave. gunman who killed an NYPD officer and three others before taking his own life, left behind a ...

Shane Tamura, 27, had a documented history of mental health problems and carried a handwritten note in his wallet when he ...

In a video message, Tisch said Tamura left a suicide note and claimed to be suffering from chronic traumatic encephalopathy ...

The crazed gunman who killed four people in Monday’s Manhattan massacre thanked a documentary on CTE brain injuries and ...

The gunman in the deadly Midtown Manhattan shooting, Shane Tamura, wrote about the brain disease CTE in a note obtained by ...

Shane Tamura — who fatally shot four people at a Midtown East office building — said in a suicide note he believed he ...

Police say Shane Tamura, the man who shot four people to death before ending his life on Monday, suffered from a ...

New York City's Office of Chief Medical Examiner told USA TODAY Sports it would examine the brain of NYC shooter Shane Tamura.

The 27-year-old man who shot and killed four people at a Midtown office building on Monday carried a note in his pocket ...

Investigators found the note in the wallet of 27-year-old shooter Shane Tamura who police said opened fire inside of 345 Park ...

CTE is a degenerative brain condition. Symptoms include loss of memory, changes in behavior, mood swings and more.