07/30/2012 14:08

By Bruna Nessif

It looks like booby traps along with IEDs, trip wires and accelerants with trigger mechanisms weren't the only things police found in James Holmes' Aurora, Colo., apartment.

A law enforcement official close to the case said today that the 24-year-old suspect's home was also decorated with Batman items, according to the Los Angeles Times.

Investigators said they "found a Batman poster on a wall, a Batman mask and other Batman paraphernalia," in Holmes' 850-square-foot apartment. (Earlier, law-enforcement sources confirmed to E! News that Holmes told police he "was the Joker" upon his arrest.)

Bomb experts and law-enforcement authorities entered Holmes' place Saturday morning in an attempt to defuse various complicated incendiary devices inside that were "set up to kill," police said.