Detectives have released images of a person they have identified as a suspect in connection to Monday’s homicide in the parking garage of Union Station.

A man was shot around Union Station just before the evening commute, according to D.C. police spokesman Sean Hickman. Officials received a call about 4:40 p.m. that a man had been shot, Hickman said. When authorities arrived, the man, whose age is unknown, was not breathing.

Police are investigating after a person was critically injured in a shooting at Washington D.C.’s Union Station.