Defense: Colorado theater shooting suspect not ready for arraignment

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)

Colorado movie theater shooting suspect James Holmes faces arraignment Friday.

That comes after a judge on Thursday night ruled he should stand trial on all 166 counts against him.

But his attorneys say they're not ready to enter a plea.

District Judge William Sylvester ruled that prosecutors had presented sufficient evidence to proceed with charges alleging Holmes killed 12 people and injured 70 others at a suburban Denver movie theater July 20.

Holmes is charged with multiple counts of first-degree murder and attempted murder.

If convicted of first-degree murder, he could face the death penalty.