'Dark Knight' Massacre -- Cops Dealing With 'Sophisticated' Bomb in Suspect's Home

Cops have their hands full with a "very sophisticated" booby trap bomb inside the apartment of the 'Dark Knight" shooting spree suspect.

Aurora, CO Police Chief Dan Oates just addressed the media about the explosive device they've found inside James Holmes' studio apartment.

According to Oates ... there's a lot of "explosive material" inside the apartment, and they are trying to figure out how to get inside without setting off the bomb.