Attorneys for Aurora movie theater shooting suspect James Holmes say there is “a great deal” of information about the case that hasn’t been made public and are asking a judge to keep a gag order in place.

“Such protections are necessary to ensure Mr. Holmes’ right to due process, a fair trial and an impartial jury,” the lawyers wrote in a court filing dated Tuesday.

Attorneys for the city of Aurora had asked the judge overseeing Holmes’ murder case to lift or modify the gag order, which bars police officers and others from talking publicly about the shootings. Aurora attorneys said the gag order was not needed anymore because numerous details about the case emerged during a preliminary hearing last month. They said the order was, for instance, preventing officers from giving training talks to other departments about their experiences responding to the theater shooting.

But Holmes’ attorneys countered that “there is a great deal of information related to this case that was not presented at the preliminary hearing, and which has not yet been made public.” They also faulted Aurora’s lawyers for being “exceedingly vague” in their request, arguing that the city didn’t explain well enough what information it wanted to be able to release.

The judge, 18th Judicial District Chief Judge William Sylvester, has yet to issue an order on Aurora’s gag-order request.

Holmes is charged with 166 counts of murder, attempted murder and other offenses for the July 20 attack that left 12 dead and 58 wounded by gunfire. The next hearing in his case is scheduled for March 12, when he is expected to enter a plea.