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In the weeks before the attack, James Holmes took photos of the Colorado movie theater where 12 people were killed and dozens more wounded in last summer's mass shooting , prosecutors revealed Wednesday at a court hearing in Colorado.

They also introduced photos he took on the night of the midnight massacre, the Denver Post reports :

"In one, marked 6:22 p.m., he was wearing black contact lenses. His hair was dyed red under a black cap, and he stuck out his tongue at the camera. In another image, he is seen smiling with the muzzle of a Glock handgun in the frame. Prosecutors told the court they introduced the self photos because they help show Holmes' 'identity, deliberation and extreme indifference.' "

Wednesday was Day 3 of a preliminary hearing to officially determine whether there's enough evidence to go forward with a trial. The proceedings are now over, local news outlets say, and the 25-year-old Holmes' attorneys chose not to call any witnesses. It's thought they may try to argue that he is insane.

Our previous posts about this week's hearing:

-- 911 Calls Played And Traps In Holmes' Apartment Described In Colo. Court .

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