Aurora, Colo. police chief Daniel Oates said this evening that the apartment complex where James Holmes lived will remain evacuated due to the complexity of the explosives found inside, including trip wires, jars of unidentified liquids and possibly mortar shells.

Oates added that the police are not yet releasing a mug shot of the suspect “for investigative reasons.” The current photo of Holmes making the rounds in the media was released by the University of Colorado, where Holmes had been a doctoral student.

Holmes had reportedly purchased 6,000 rounds of ammunition on the Internet and wore a tactical vest, ballistic helmet and gloves.

Oates noted that police officers have been working 12-hour shifts due to the demand and that one ongoing issue for the police is “how we’re going to deal with our own trauma.”

The next police briefing is scheduled for 2 p.m. Mountain time on Saturday.

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