New details are emerging about the suspected New York City gunman who opened fire at a Park Avenue office building on July 28, killing four people, including a police officer. Shane Devon Tamura, a 27-year-old resident of Nevada,

A man exited a double parked BMW with an M4 rifle and then walked toward the skyscraper that is home to the headquarters of both the NFL and Blackstone, one of the world’s largest investment firms, as well as other tenants on Monday evening, according to surveillance video.