Killer Moth is a fictional character in the DC Universe. He first appeared in Batman #63 published in 1951. Killer Moth originally wore a garish costume of purple and green striped fabric, with an orange cape and a moth-like mask. Killer Moth is not to be confused with another Batman villain, Firefly, who has worn a similar costume. The original Killer Moth was a prisoner identified only by his prison number, 234026. While in prison, he reads a newspaper article about Batman and decides to set himself up as the "anti-Batman," hiring himself out to Gotham City's criminals to help them elude capture by police. Upon his release, he uses the hidden proceeds of his crimes to build a "Mothcave", modeled on the photos of the Batcave in the newspaper article he read. Killer Moth also establishes a false identity as millionaire philanthropist Cameron van Cleer. In this guise, he becomes friends with Bruce Wayne. Meanwhile, he promotes himself to Gotham's criminals using his identity as Killer M...