(WPXI) – Allegheny County Police say A man charged in a hit-and-run crash that left a young musician dead in Dormont – is an undocumented immigrant. The crash happened Saturday night near Pioneer and West Liberty Avenues, killing 23-year-old Christian Sluka. Police have identified 25-year-old Saul Rivera-Ramirez as the driver. After the crash, police say he allegedly got out of the car and ran away from the scene. Rivera-Ramirez was arrested and is facing several charges including homicide by vehicle and driving without a license. Detectives say they learned Rivera-Ramirez is not a United States Citizen and is an undocumented immigrant and subsequently contacted U.S. Immigration.