The Chameleon
From superman.nu: Supermanica
The Chameleon
The so-called "thief of faces," an uncanny master of disguise and impersonation who commits a series of brazen robbery-murders, each time in the guise of a carefully selected victim, with the result that he and his henchmen escape with the loot while the men he impersonated are accused of the crimes. Superman apprehends the Chameleon and his cohorts in November 1948, in the process using a mobile television unit—"most modern of scientific miracles"—to broadcast evidence implicating the gang to a live TV audience (Act No. 126: "Superman on Television!"). (TGSB)