The girl was taken to St. Christopher's Hospital in stable condition.
A 29-year-old woman was killed after being struck by a vehicle just seconds after getting out of a rideshare in Philadelphia's Eastwick section early Monday morning.
"Investigators believe she may possess vital information that could assist in the ongoing investigation," police said in a statement.
Paul Pelosi has been charged with a misdemeanor hit-and-run after a collision.
Police are asking for help identifying the victim, as well as the striking vehicle.
A woman is in critical condition after being struck by a vehicle on I-95 after crashing her car into the median, police say