Two teams NYPD detectives headed to Las Vegas Tuesday, to execute search warrants at Shane Tamura's home and at a gun store where he legally purchased a revolver on June 12 using a Nevada concealed carry permit,

Multiple casualties as gunman opened fire in the lobby of the midtown Manhattan building on Park Avenue that is home to the Blackstone investment firm and other corporations before moving to other floors.

(CNN) — Investigators are combing through evidence in the wake of New York City’s deadliest mass shooting since 2000, trying to figure how a gunman came to unleash an assault-style rifle in Midtown, fatally shooting four people – including a police officer – and injuring one before killing himself.

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

A note written by the shooting suspect was found at the midtown Manhattan office building scene where he killed four people, including an NYPD officer, and himself a day ago, officials familiar with the investigation said overnight.

NEW YORK (AP) — At least two people, including a New York City police officer, were shot Monday in a midtown office building that houses some of the country’s top financial firms and the National Football League, a person familiar with the matter told The Associated Press.

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

The gunman who killed four people in a Midtown Manhattan office building Monday was targeting the NFL offices but took the wrong elevator bank in the tower.