Waylon Jones was born with a rare skin condition that gave him a reptilian appearance, his mother was disgusted by her newborn son's mutation and threw him down in the sewers where he spent most of his life. He was mistreated for his rare condition which caused him to become known as the villain Killer Croc. Unlike most versions of Waylon Jones, a deformed criminal, Batman: Gotham Knight portrays him as cannibalistic and much darker. In his childhood Waylon was in a freak show and called "Killer Croc" because of his scaly appearance.