Paul Warren Pardus, who was visiting his elderly mother at the hospital, shot her doctor and then killed his mother and himself on Thursday.
Police began an evaluation of the shooting on Friday, the Baltimore Sun reported. Police Commissioner Frederick H. Bealefeld III said they're asking whether there was a clue that could have been picked up. He said it's important to go back and review the shooting for residents' safety.
Bealefeld says he wants to know whether Pardus always carried his small handgun, which could be "concealed in the palm of your hand," when he visited his mother at the hospital.