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Members of law enforcement wearing body armor and helmets prepare to what ATF sources describe as a"water shot" in the apartment of alleged gunman James Holmes Saturday, July 21, 2012 in Aurora , Colo. The "water shot" is exploded and used to disrupt the device. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

Colorado suspect's booby-trapped home

July 29, 2012

In Aurora, investigators spent hours July 21 removing explosive

materials from inside Holmes' apartment, rigged with jars of liquids, explosives and chemicals that were booby trapped to kill "whoever entered it," a day after police said he

opened fire and set off gas canisters in a theater minutes into a

premiere of the "The Dark Knight Rises." The massacre left 12 people dead and 58 injured.