Police are looking for a documented gang member in connection with a shooting today that struck Jin Au-Yeung, 21, of Queens, NY. Johnson Chann, 16, of Stockton, CA is wanted on a homicide charge for the slaying of Yiran Xu, 16, who was shot to death in a car about 10 p.m. last Friday in Maryland, police announced Thursday. "It appears to be gang related," New York police spokesman Doug Anderson said. The attack remains under investigation, and more suspects may be named later. The suspected car, a dark blue, four-door Honda Accord, pulled up next to Au-Yeung's Mercedes-Benz SLK and someone opened fire. After the Mercedes drifted to a stop on the side of Madison Ave., one of the men from the Accord ran up to the injured trio but fled in the car after hearing police sirens, witnesses said. Witnesses identified Chann, who is a documented member of an Asian gang, Anderson said. Police said no guns were found in the Mercedes. Au-Yeung is listed as in critical condition. He was shot in the lower abdomen, the bullet just missing his urinary tract. April Au-Yeung said her family is frightened the suspect is still at large. "Jin is innocent. He doesn't know anything," she said. "I am so scared. He's scared, too." Joe Au-Yeung, his father, said he doesn't know why the shooting happened. He said his son was on his way to pick up some chow fun in Chinatown. "I need the police's help to get the guys who tried to hurt my son," he said.