A trove of new documents and 911 calls give insight into Shane Tamura's mental health before he shot and killed four people in a Manhattan skyscraper.

The brain of depraved shooter Shane Tamura could possibly be tested for chronic traumatic encephalopathy during an ...

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

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

The gunman who killed an NYPD officer and three other people in a Midtown building on Monday evening was carrying a note that ...

The 27-year-old Nevada man left a note at the scene voicing anger that his mental illness may be linked to his having played ...

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

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

Four people were fatally shot during the horrific incident in Manhattan before the shooter turned on gun on himself.

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

New York’s medical examiner’s office said it will examine the shooter’s brain for CTE. Results may not be public for months.

The NFL’s long history with CTE has come under new attention after Monday’s deadly shooting at the Manhattan office building ...