Prosecutors paint grim picture of theater shooting suspect; judge deciding if trial warranted

Chantel Blunk, left, is escorted by a victims assistant as she arrives for the third day of a preliminary hearing for Aurora theater shooting suspect James Holmes at the courthouse in Centennial, Colo., on Wednesday, Jan. 9, 2013. Chantel's husband Jon was killed in the shooting. (AP Photo/Ed Andrieski) (The Associated Press)

Karen Pearson, the lead prosecutor, arrives for the third day of a preliminary hearing for Aurora theater shooting suspect James Holmes at the courthouse in Centennial, Colo., on Wednesday, Jan. 9, 2013. (AP Photo/Ed Andrieski) (The Associated Press)

Defense attorney Daniel King leads his team to court for the third day of a preliminary hearing for Aurora theater shooting suspect James Holmes at the courthouse in Centennial, Colo., on Wednesday, Jan. 9, 2013. (AP Photo/Ed Andrieski) (The Associated Press)

A judge is weighing the evidence in the Colorado theater shootings and is expected to decide by Friday over ordering a trial for James Holmes on more than 160 counts of murder and attempted murder.

Judge William Sylvester will consider the case prosecutors made in a preliminary hearing that ended Wednesday.

Prosecutors said Holmes spent weeks preparing for the attack, amassing guns and thousands of rounds of ammunition. Prosecution witnesses described the hellish scene inside the suburban Denver theater on July 20, where 12 people were killed and 70 were injured.

Defense lawyers didn't call any witnesses for the hearing but again raised the issue of mental health. They have told the judge Holmes suffers from a mental illness.