Metro has lost a customer after another alleged incident of teen violence last week.
"I'm not going to ride the subway," 41-year-old Robert Joy said. "Not even a Metrobus. I'll be safer in a cab."
At about 6:30 p.m. Friday, Joy was waiting for his niece to arrive at the Suitland Metro Station on the Green Line in Maryland when he saw a group of about 15 teenagers dressed in black, some wearing masks, beating up another teenager on the ground.
A woman urged Joy to call 911. When he took out his phone to call police, the teen mob turned on him, he said.
The teenagers knocked Joy to the ground and kicked him in the face.
"It's a tragedy for innocent people to get attacked at the subway," Joy said.
Joy's two front teeth were knocked out. He has six stitches inside his mouth, two stitches outside. His right eye is black and blue and bloody.
"After, I remember I just got up a couple minutes after that and everybody was gone, and I walked back over to the station to ask them if I could use the telephone, and they wouldn't let me use the telephone," Joy said. "The attendant gave me 50 cents to use the pay phone."
Transit police are aware of the incident and are investigating, Metro said. Anyone with information about the alleged attack should call Metro police at 202-962-1792.