CTE cannot be diagnosed until the patient has died and their brain examined. But doctors said there are symptoms such as ...

CTE, caused by repeated head trauma, has prompted a reckoning at all levels of football. The gunman believed he was suffering ...

The gunman accused of killing four people in New York City suspected he had chronic traumatic encephalopathy, or CTE — a ...

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

Shane Tamura, the 27-year-old gunman who fatally shot 36-year-old New York City police officer Didarul Islam and several ...

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

The gunman in a recent Manhattan shooting claimed he had CTE. Here's what CTE is, plus what the most recent research suggests ...

Shane Tamura is suspected of shooting four people in Midtown Manhattan, where the NFL offices are. A note he left references ...

Chris Nowinski, co-founder and CEO of the Concussion Legacy Foundation, joined ABC News Live to discuss the Manhattan shooting suspect’s claim of having CTE.

Here in New York, police have revealed new details about Monday’s mass shooting in Midtown Manhattan. Investigators say ...

Experts at BU, home to the largest brain bank in the world, are willing to assist investigators after a gunman killed four ...