CSI: NY (2004)

S1E3 American Dreamers

When a skeleton is discovered on a tour bus, and is revealed to be more than ten years old, Mac and his team investigate the backpack found with it. Their search leads them to a young man named Aaron Moreland, but they soon realize the remains can't possibly be his. Following clues from the victim's shirt, the detectives track down a youth center employee who feigns ignorance about the boy, but is concealing his own dark secret.