National Comics #72 (1949)

Sally O'Neil investigates a string of baffling crimes committed by a mysterious thief who leaves no trace—until she connects the dots to a disgruntled former carnival performer known only as Mr. Malevolence, a man so small he’s gone unnoticed. As the police close in, the criminal’s true identity and motives begin to unravel, revealing a past rooted in resentment and a desire for revenge.

Steve Wood, the waterfront detective, investigates the suspicious drownings of three men, all linked to drug addiction, and follows a lead to a mysterious figure known only as "the Squid." As he tracks down a key informant, he uncovers a dangerous underwater operation tied to the drug trade, leading to a tense confrontation beneath the docks.