In Teenage Mutant Ninja Turtles: Amazing Adventures by IDW Publishing, Aaron Cash is a long-standing security guard at Arkham Asylum. This has led him to have several interactions with the superhero Batman. He lost his left hand in a fight with Killer Croc, who attacked him and ate it. It was replaced with a metal hook. This led the inmates to nickname him "Captain Hook" for his resemblance to the character in Peter Pan. Despite this handicap, he is known as one of the toughest guards at Arkham.
History[]
The Face of Two Worlds[]
As Batman is investigating the cell belonging to Two-Face, who had previously escaped Arkham Asylum, he hears two people approaching. An orderly and the security guard, Aaron Cash, discuss how Batman returned Two-Face to the Asylum and wonder how the other inmates escaped. Cash points out that all the security cameras were fried, so they have no clue about the means of escape.