The case of two high school students, one dead and one missing, lead the CSIs into the underbelly of streetcar racing and a tangled web of deadly competition.
Nick and Greg are looking for evidence of a drag race & music plays in the background while they are taking pictures of tire treads & it shows Cindy getting hit by a car.
Music plays in the background at the beginning of the scene showing the "Las Vegas Police Dept. Street Rumble", which is a place for people to go and legally show off their cars & drag race.