Police say 17-year-old Elijah Washington had suffered multiple gunshot wounds before his body was found Wednesday by his father and older brother.
The teen's body was found in some bushes beneath a bridge spanning the tracks.
The victim's father, Marvin Washington, says an acquaintance of his younger son called his older son to say he was among a group of people who'd been shot at Tuesday night. When Marvin Washington called his son's school and learned he wasn't there, he began searching.
Homicide detectives are conducting interviews but police say they have made no arrests.