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MARKHAM, Ill. —  A Harvey police spokesperson is asking for help finding the gunman who killed his nephew.

Sean Howard says his nephew, 18-year-old Joshua Wright, was shot Tuesday while sitting in a car with his girlfriend and one-week old baby boy in Markham.

The family was parked outside the friend’s house, when someone inside a SUV pulled up and opened fired.

Howard says at least 13 shots were fired into the car.

Wright was hit in the head, and later died at a hospital. His girlfriend was shot in the arm, and is recovering. The baby was not injured.

No one is in custody.

Howard says he has spoken with relatives and checked social media accounts but has not found any evidence so far that points to a possible motive for the shooting.