New York City rookie police officer Peter Liang, center, leaves the courtroom after he pleaded not guilty at his arraignment at Brooklyn Superior court, Wednesday, Feb. 11, 2015, in New York. Liang, who fired into a darkened stairwell last November at a Brooklyn public housing complex, accidentally killing 28-year-old Akai Gurley, has been charged with manslaughter, official misconduct and other charges. He was released without bail. (AP Photo/Mary Altaffer)