No motive has been announced. A suicide note was found expressing grievances with the NFL and saying Tamura suffered from CTE, a source said. Follow for live updates.

Islam, who had been a New York City police officer for 3 1/2 years, worked out of a precinct in the Bronx, where he lived with his family, officials said. The 36-year-old immigrant from Bangladesh was married with two young sons and a third child on the way,

New York City has some of the toughest gun laws in the nation. But Monday’s mass shooting showed their limits, security experts said.

The gunman accused of killing four people in a Midtown Manhattan office tower bought the AR-15-style rifle used in the attack from his boss at a Las Vegas casino.

A person from Las Vegas bought a piece of the rifle used by Shane Tamura in the deadly shooting at a New York office building this week.