The apartment of James Holmes, suspected of killing 12 and wounding scores more in Friday morning’s movie theater massacre, was rigged with complicated explosive traps, police said. Saturday morning, officers planned to send in a robot to detonate them. Chris Henderson, Aurora, Colo.’s deputy fire chief, told Reuters that Holmes's living room was filled with tripwires connected to plastic bottles filled with an "unknown liquid." Other authorities said that speakers in the apartment were set up to blast loud music, so as to lure police in. "If he was shot and killed, it is without a doubt that these ... booby traps were there to murder and inflict casualties upon first responders," a source said. Meanwhile, new details on Holmes's background have painted him as a smart but socially awkward student with an interest in movies and the media who graduated college with a degree in neuroscience. Holmes allegedly dressed up as Batman franchise character the Joker before entering the Aurora theater with an AR-15 assault rifle, a 12-gauge shotgun, and a Glock .40, and opened fire.