Police Comics #97 (1949)

In the wake of being fired, the disgruntled makeup artist Prentice Mime takes revenge by impersonating the cashier at Crumton’s downtown theatre, stealing the box office receipts and framing her. When Plastic Man arrives to help track down the thief, he discovers the real culprit has vanished—leaving behind only the perfect disguise of the cashiers he’s replaced.

In the mystery "Who Killed Cox Robin?", a showgirl's murder sets off a web of deception and mistaken identity, as the Spirit and Commissioner Dolan piece together clues from a staged crime scene and a suspicious photograph. With a trail of red herrings, a forged alibi, and a clever impersonation, the case hinges on who truly orchestrated the setup—and why a known criminal was so eager to take the fall.