Here's how NFL players, coaches and executives reacted to a mass shooting at the league's office building in Manhattan: ...

The injured NFL employee in the New York City shooting has been identified as Craig Clementi, per reports. Here's the latest ...

Shane Tamura speculated in a suicide note that he was suffering from CTE, a degenerative brain disease associated with sports ...

Two teams NYPD detectives headed to Las Vegas Tuesday, to execute search warrants at Shane Tamura's home and at a gun store ...

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

A note found in the gunman's wallet was critical of the NFL and mentioned CTE. The 27-year-old wrote, “Study my brain please.

Manhattan shooting latest: 4 dead in NFL HQ building as cops identify gunman as former high school football star - Police say Shane Tamura killed NYPD officer Didarul Islam and critically injured an N ...

The gunman who killed four people in a midtown Manhattan office building left a suicide note indicating that he was targeting ...

An NFL employee was seriously injured in a shooting at a   Midtown Manhattan office tower Monday where a gunman killed at ...

Shane Devon Tamura, 27, identified by the NYPD as the Midtown Manhattan office building shooter/Obtained by ABC News(NEW YORK ...

The New York City office building at 345 Park Avenue where a deadly shooting occurred serves is the headquarters of ...