CENTENNIAL, Colo. — Screaming gunshot victims were stampeding out of a Colorado movie theater after police arrested James Holmes, court documents say, so police officers repeatedly asked him if there was another shooter.

“It’s just me,” Holmes said, according to documents and testimony.

Officers asked Holmes other questions about weapons and explosives. Roughly two hours would pass before the chaos subsided and detectives would read Holmes his Miranda rights — anything you say can be used against you.

Today, Holmes’ lawyers will argue that delay violated his constitutional rights and anything he told the arresting officers should be barred from his trial.

Prosecutors will counter the officers urgently needed to know whether Holmes had an accomplice who could still be shooting and killing people at the Century 16 theater in Aurora. They contend the questions were legal under a public-safety exemption to the Miranda rule.

Holmes is accused of slipping into the suburban Denver theater on July 20, 2012, and opening fire on more than 400 people who were watching a midnight showing of a Batman movie. Twelve were killed and 70 injured.

Holmes, then 24, had just quit a Ph.D. program in neuroscience at the University of Colorado, Denver.

He pleaded not guilty by reason of insanity to more than 160 counts of murder and attempted murder. His lawyers acknowledge he was the shooter but say he was in the grip of a psychotic episode.