Authorities say the biker was doing wheelies on the highway when the crash occurred.
PHILADELPHIA (WPVI) -- A teenager who was hit by a dirt bike rider in Philadelphia on Sunday night has died, police said Wednesday.
The crash happened around 10:30 p.m. on Allegheny Avenue near Front Street in North Philadelphia.
Police said the dirt bike rider was speeding and doing wheelies when he struck Jesus Gomez Rosario, 17, who was riding on a skateboard.
Rosario was taken to Temple University Hospital where he died from his injuries on Tuesday morning.
His family is now fighting for justice.
"I want justice, justice for my brother. He didn't deserve to die that way," said Rosario's sister, Yahaira Colon.
Police released video of the wanted dirt bike rider.
"Everybody was trying to help (Rosario) because he was in shock. He didn't know what to do," said D'marco Vianez, who witnessed the crash.
The male dirt bike rider was last seen wearing a black helmet, red bandana or scarf around his neck, white t-shirt, black pants and white sneakers.
He left the scene with the dirt bike east on Allegheny Avenue, police said. He appeared to have minor injuries.
The dirt bike has green wheels and a green body that was damaged on the left side.
Family members and police are hoping the suspect will turn himself in.
"I want the person who did this to my brother to come forward. I believe in accidents, but once you left the scene and left him on the floor, to me now, I want justice," Colon said.
Anyone with information is asked to contact the Philadelphia Accident Investigation District at 215-685-3184.