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

Authorities say the man who killed four people at a Manhattan office building bought the rifle he used in the attack and the ...

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

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

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