Philadelphia (AP) Philadelphia police have arrested a man suspected of brutally attacking a stranger on a subway car with a hammer.
Family members called police to identify the uspect after surveillance video showed the apparently unprovoked assault last week.
The suspect was apprehended last night while in a mental institution.
The video shows the suspect getting on a train car with a young boy, pulling a hammer from a backpack and repeatedly hitting a man dozing in a nearby seat.
The victim, a 20-year-old lab tech, has been released from a hospital. He says he has no idea why he was targeted.
Many in the city are questioning why none of the other passengers on the train intervened to stop the attack.