James Holmes is due in court Friday to hear whether he has to stand trial for the shooting. If, as expected, a judge finds that there's enough evidence for a trial, he could be arraigned on more than 160 felony charges and required to enter a plea.

But Holmes' attorneys filed papers Thursday afternoon saying he was not ready to be arraigned. They're asking Judge William Sylvester to consider the hearing as only a routine pretrial hearing.

The defense lawyers did not explain why they want the delay.

A preliminary hearing to establish whether Holmes should stand trial for the attack ended Wednesday.