updated 07/20/2012 AT 2:40 PM ET
•originally published 07/20/2012 AT 3:00 PM ET
James Holmes, the alleged gunman who killed 12 people and injured dozens during a screening of the Batman movie The Dark Knight Rises, described himself as the hero’s arch nemesis, a police official says.
“It clearly looks like a deranged individual. He had his hair painted red, he said he was ‘The Joker,’ obviously the enemy of Batman,” New York Police Commissioner Ray Kelly said Friday at a press conference.
The source of Kelly’s information wasn’t immediately clear – also, The Joker had green hair.
However, the commissioner is reportedly a close friend of Dan Oates, the chief of police in Aurora, Colo., where the massacre occurred. Oates, formerly a longtime member of the New York Police Department, didn’t confirm or deny The Joker account, but did say he had spoken with Kelly.
Two federal law enforcement officials confirmed to ABC News the details of The Joker costume.