CENTENNIAL, Colo. (AP) -- A Colorado judge says there's enough evidence for James Holmes to face trial on charges that allege he killed 12 people and injured dozens of others in an Aurora movie theater last summer.

Judge William Sylvester said Thursday that prosecutors have established probable cause on more than 160 felony counts.

On Friday, the judge granted a defense motion to delay Holmes' arraignment until March 12.

Defense lawyers didn't give a reason for the delay.

One possible reason could be to seek a mental health evaluation by a doctor of their choosing. His lawyers have said Holmes is mentally ill, raising the possibility of an insanity defense.

If Holmes had entered an insanity plea Friday, an evaluation would be done by state doctors.