Taylor Fitting, 16, was shot and killed at 112th Street and Normal in Chicago's Roseland neighborhood at approximately 9:30 p.m. Monday, according to authorities.
Fitting was a freshman at Morgan Park. She suffered a gunshot wound to the head.
Police say someone dropped Fitting off at Roseland Community Hospital without talking to them. According to the Cook County Medical Examiner's office, the girl was then transferred to Advocate Christ Medical Center in southwest suburban Oak Lawn, where she was pronounced dead just before midnight.
Investigators say they are trying to figure out who took her to the hospital and who shot her.
Fitting's grandmother, Susan Tranchita, said authorities watched videos from the hospital of someone dropping Fitting off, putting her in a wheel chair and pushing her into the door. The person then turned around and left.
"She was my baby. She was my only grandchild," an emotional Tranchita told ABC7.
Fitting lived with Tranchita in the city's Beverly neighborhood. Tranchita said her granddaughter left the house with friends Monday night and never returned.
Tranchita said she has heard bits of what happened from the friends who were with Taylor. She said as the car was passing a group of people standing on the street, someone fired into the car.
Chicago Police Area South detectives are working the case, but say they only have preliminary information so far. Family and friends say police have taken a car into evidence.
"I mean it was an all black car, all black tinted windows. So, I mean, if you're going in a gang area -- I mean, I think she was just there at the wrong time," the victim's boyfriend Gabriel Forgue said.
Tranchita said Fitting was notorious for skipping school, which held her back a year, but was a good kid and a loyal friend who had dreams of becoming a photographer.
Taylor's death has stunned Kayla Lewis, who says they were best friends, although they had a falling out because Taylor began hanging with a questionable crowd.
"She was not a bad person but she did hang around people who do tend to do bad, risky, dangerous things," said Lewis.
A $1,000 reward is being offered for information leading to an arrest.