Didarul Islam, a 36-year-old NYPD officer, was off duty and working a security job when he was fatally shot by a gunman who opened fire at the 345 Park Avenue office building on Monday. Islam, a Bangladeshi immigrant who joined the NYPD four years ago, is survived by his wife, who is eight months pregnant, and two young sons.

Shane Devon Tamura, 27, was identified as the shooter who had driven across the country from Nevada and arrived in New York City hours before the shooting, according to officials. Tamura shot himself in the chest on the 33rd floor of the building before police found him.