01/09/2013 01:57 pm ET Updated Jan 09, 2013

James Holmes Preliminary Hearing Ends With Defense Calling No Witnesses

The preliminary hearing about the alleged gunman who killed 12 and wounded 58 in a Colorado movie theater ended on Wednesday without the defense calling any witnesses.

The Colorado court recesses until Friday when Arapahoe County District Judge William Sylvester will rule if the prosecution's case against suspected shooter James Holmes is strong enough to proceed to a trial, the Associated Press reported.

The prosecution wrapped up its presentation after 2.5 days of testimony in which police testified about the carnage insidie a midnight screening of "Batman: The Dark Knight Rises" on July 20 and a theatergoer's plaintive 911 call that was drowned out by the sound of gunfire in the background.

Holmes, 25, a graduate school dropout faces 166 counts of murder, attempted murder and weapons charges for one of the worst mass killings in American history.

On Wednesday, the prosecution displayed photos Holmes took of himself hours before the attack. In one, he smiles posing next to a handgun, NBC News reported.

In another, he sticks out his tongue. Holmes snapped pictures with his cellphone of the interior and exterior of Century Aurora 16 Multiplex Theater weeks before the rampage, CNN reported.

Prosecutors argued that Holmes planned the shooting with deliberation and extreme indifference.

"He didn't care who he killed," prosecutor Karen Pearson said, according to CNN. "He intended to kill them all."

It had been speculated that the defense might call mental health specialists to testify about Holmes' psychological condition. It's known that he'd seen a therapist regularly before the shooting.

It's expected that Holmes' attorneys will adopt an insanity-defense strategy to shield their client.

Earlier in the week, police testified about the elaborate traps Holmes set in his apartment to cause an explosion or fire. Cops also described his peculiar behavior after his arrest in which he acted as if the bags on his hands protecting any gun residue were puppets. Holmes also calmly flipped a cup while in police custody.

(Update to follow.)