New York City police detectives searched a studio apartment in Las Vegas that belonged to the suspected gunman in Monday's mass shooting at a Midtown Manhattan.

NYC gunman Shane Tamura is seen on video talking about his high school football career in California after a game in September 2015.

The man behind Monday’s deadly shooting at a Midtown Manhattan office building, 27-year-old Shane Tamura, may have tried to target the NFL.

The gunman who opened fire Monday in a New York City office building, killing four people, was identified as a former Southern California high school football player. Law enforcement in New York identified the gunman in the Park Avenue building shooting as 27-year-old Shane Tamura,

Investigators are examining why the gunman who killed four people before taking his own life at a New York City office tower targeted the National Football League and whether he suffered from a brain disease.

A New York City police officer who was among the four people shot and killed by a gunman during a rampage at a Manhattan office tower will be laid to rest Thursday. Officer Didarul Islam, 36, was fatally shot Monday in a midtown building housing the National Football League’s headquarters.