Killer Croc is a fictional character appearing in American comic books published by DC Comics, commonly as an adversary of the superhero Batman. The character belongs to the collective of adversaries that make up Batman's rogues gallery. Originally a sideshow wrestler, Waylon Jones suffers from a rare genetic condition giving him a crocodile-like appearance and superhuman abilities. Driven insane by his irreversible transformation, he adopted the name "Killer Croc" and turned to a life of crime, over time developing animalistic tendencies which make him a dangerous individual. The character has also been a member of the Suicide Squad, debuting in the fifth volume of the comic series revolving around the team, and a romantic interest of Enchantress. Originally portrayed as a supervillain, later stories would show the character in a more anti-heroic light. The character has been adapted into various media, most revolving around Batman. Killer Croc made his live-action debut in the 2016 DC Extended Universe film Suicide Squad, portrayed by Adewale Akinnuoye-Agbaje. A version of the character appeared in the third season of the Arrowverse series Batwoman, performed by Heidi Ben. Publication history Killer Croc was created by writer Gerry Conway and artist Gene Colan. The character made cameo appearances in Detective Comics #523 (February 1983) and Batman #357 (March 1983), with his full first appearance in Detective Comics #524 (March 1983). Fictional character biography Pre-Crisis Waylon Jones was born with a rare form of atavism that imparted him with reptilian traits with his birth causing the death of his mother. He was raised by his aunt, an abusive alcoholic who called him names like "lizardboy" and "reptilian freak". Croc eventually killed his aunt and became a criminal in Gotham City. After committing several murders, he faced off against Batman and the new Robin, Jason Todd, who defeated him. In these original, Pre-Crisis appearances, Killer Croc resembled a powerfully built man covered entirely in green scales, but was still basically human in his facial proportions and build. He was also originally depicted as killing Jason Todd's parents (this was later retconned to make Two-Face their murderer). Post-Crisis Killer Croc escaped custody and sought revenge on Harvey Bullock and two other criminals who got him in jail. Batman tracked him down and Croc went into a homicidal rage. When new water tunnels were built, which would flood Killer Croc's new home, Croc seemingly sacrificed himself to hold the water