Campus Sleuth (1948)

"It's a Rumpus on the Campus!"

A photographer is murdered just outside of where a college dance is being held. The body is discovered by Lee Watson, but promptly disappears, as it's whisked around the campus by an ex-con night watchman. However, he is not the killer, and Freddie, Betty, Dodie, and Lee set out to find the culprit, who managed to put a big damper on the big dance.