Didarul Islam, a 36-year-old New York Police Department officer, was among four people killed Monday evening in Midtown Manhattan when a gunman stormed the lobby of the sprawling 345 Park Avenue office tower and opened fire.

Roland Schmidt, 76, has been charged with the first-degree murder of Christine Moyer, 45, following the deadly shooting in the parking lot of a Marriott hotel in Schaumburg, located in the northwest suburbs of Chicago, local police said.