Waylon Jones

Missing Data

Killer Croc

Missing Data

Threat Assessment

Missing Data

Arkham File

Medical Profile

  • Patient was born with what was believed to be a rare skin disorder but as he continued to age, his condition "evolved" into a unique physiology.
  • Patient is remarkably strong even with the inhibitor collar set to maximum.
  • Patient should be housed in our "Croc Tank" in the basement, as patient is at ease in the water and the heated water will help regulate his body temperature.

Metahuman Profile

  • Patient is a metahuman with genetic mutations which grant reptilian features such as regenerative healing, enhanced predatory senses, a carnivorous diet, cold-blooded circulatory system, fanged teeth, and razor sharp claws.
  • Patient possesses Class IV Enhanced Strength.

Psychological Profile

  • Patient engages in anthropophagy (cannibalism).
  • Patient's intelligence seems to vary according to level of aggression and length of time since his last feeding.

Behavior Profile

  • Patient is extremely volatile and aggressive.
  • SECURITY CAUTION: Patient has killed and injured multiple staff
  • Patient had a former partnership with Marian Dahl (Patient #94101), which may or may not have been romantic in nature. Keep the two separated.
  • Threat Assignment: Severe
  • Treatment Ranking: 6-Hostile
  • Intake Interviewer: Dr. Roy Westerman
  • Assigned Patient Coordinator: Dr. Hugo Strange[1]

Trivia and Notes


  • Killer Croc bit off Captain Cash's hand. In revenge he is wearing alligator skin boots.
  • When he's in Arkham he's kept in the Basement in a Crock Tank.


  • Killer Croc's Patient number (#83357-M) is a nod to his first comic book appearance: Batman #357, in 1983

Links and References

  1. Arkham Files: Killer Croc
Community content is available under CC-BY-SA unless otherwise noted.