A college student disappeared from her dorm on her last night on campus. She called a cab but never went out to get it. It was a dark and stormy night. Red herrings include the college professor and the school jock who raped the missing girl's friend. The body is found in compacted trash squares in a warehouse.
The CSI team wonders how the girl ended up in the dumpster. An autopsy shows a crushed spleen from blunt force trauma. They find flecks of car paint on the dumpster and track down the Jeep Cherokee driver. The driver says he cut through campus because his wife was home in labor. He swerved through the rain and sideswiped a dumpster but he's sure he didn't hit anybody.
The CSI team empties some trash down the dorm trash chute and the faulty bin door snaps at the girl emptying the trash. They surmise that the dead girl accidentally dropped the trash can down the chute then went outside to get it. The girl must have started to climb into the dumpster to retrieve her trash can and been leaning into the dumpster by her waist when the guy in the Jeep Cherokee sideswipes the dumpster, knocking it into the wall, crushing the girl's spleen and her lifeless body falls into the dumpster where it remains until the trash truck empties the dumpster and compacts her into a bundle of refuse. End of story.