Police are asking for the public's help in identifying a suspect who they say stabbed an 18-year-old man at the A C subway platform at the Broadway Junction station early Saturday morning. Police say the male suspect approached the victim and started an argument that turned violent around 5 a.m. Police say the man punched the victim in the left eye with brass knuckles, causing bruising, swelling on the face and fled the location on foot on a northbound A train. The 18-year-old also suffered a stab wound to the back. He was taken to an area hospital where he was in stable condition as of Sunday night. Anyone with information is asked to contact Crime Stoppers.