Shane Tamura, 27, who fatally shot four people in the building that houses the National Football League's headquarters Monday ...

Four people were killed on Monday when a man, identified by police as Shane Tamura, walked into the lobby of 345 Park Avenue ...

Officer Didarul Islam, 36, who was guarding the building on a paid security job when he was killed, had served as a police ...

Law enforcement sources say Shane Tamura bought the AR-15 style rifle he used to open fire at a Manhattan skyscraper from a former co-worker for $1400. The sources say that former co-worker also sold ...

The attack on a seemingly secure building has rattled workers and prompted managers to examine whether they are adequately ...

New York City detectives investigating this week's mass shooting were interviewing the attacker's associates in his home ...

The man who stormed a Manhattan office tower with a gun, killing four people before killing himself, worked in the ...

A former Southern California football coach who once coached the suspect in the deadly mass shooting inside a New York City office building is speaking out. Good Morning America sat down with Walter ...

Last week, NYPD Officer Didarul Islam thought he knew exactly where he and his family would be the following Wednesday: ...

As more information comes out about the man who shot and killed four people inside a midtown Manhattan office building before ...