James Holmes shuffled into court in a maroon jailhouse jumpsuit with his hands cuffed - the first look the world got of the 24-year-old since the Friday shooting that left 12 people dead and 58 others injured at a packed midnight screening of "The Dark Knight Rises."
Unshaven and appearing dazed, Holmes sat virtually motionless during the hearing, his eyes drooping as the judge advised him of the severity of the case. At one point, Holmes simply closed his eyes.
He never said a word. His attorneys did all the talking when the judge asked if he understood his rights.
Prosecutors said later they didn't know if Holmes was on medication. Authorities have said he is being held in isolation at the jail. Holmes' demeanor appeared to anger the relatives of some of the victims who attended the hearing. One woman's eyes welled up with tears.
The hearing was also the first confirmation that Holmes' hair was colored. On Friday, there were reports of his hair being red and that he told arresting officers that he was "The Joker." Batman's nemesis in the fictional Gotham has brightly colored hair.
It could not immediately be confirmed if he told officers that he was Batman's enemy, however.
Investigators found a Batman mask inside his apartment after they finished clearing it of booby traps, a law enforcement official close to the investigation said Sunday on condition of anonymity because he was not authorized to speak to the news media.
Holmes, whom police say donned body armor and was armed with an assault rifle, a shotgun and handguns during the attack, was arrested shortly afterward. He is refusing to cooperate, authorities said. They said it could take months to identify a motive.
Holmes was brought over from the Arapahoe County detention facility and walked into the courtroom with attorneys and others. He sat down in a jury box, seated next to one of his attorneys.
His entrance was barely noticeable but relatives of shooting victims leaned forward in their seats to catch their first glimpse of him. Some stared at him the entire hearing, including Tom Teves, whose son, Alex, was killed in the shooting. Two women held hands tightly, one shook her head.
After the hearing, prosecutor Carol Chambers said that "at this point, everyone is interested in a fair trial with a just outcome for everybody involved." Chambers said earlier her office is considering pursuing the death penalty against Holmes. She said a decision will be made in consultation with victims' families.
David Sanchez, who waited outside the courthouse during Holmes' hearing, said his pregnant daughter escaped uninjured but her husband was shot in the head and was in critical condition.
"When it's your own daughter and she escaped death by mere seconds, I want to say it makes you angry," Sanchez said. He said his daughter, 21-year-old Katie Medley, and her husband, Caleb, 23, had been waiting for a year to watch the movie.
Asked what punishment Holmes should get if he is convicted, Sanchez said, "I think death is."
His daughter was scheduled to deliver her baby on Monday.
Holmes is expected to be formally charged next Monday. Holmes is being held on suspicion of first-degree murder, and he could also face additional counts of aggravated assault and weapons violations. Holmes has been assigned a public defender.
Security at the hearing was tight. Uniformed sheriff's deputies were stationed outside, and deputies were positioned on the roofs of both court buildings.
Police have said Holmes began buying guns at Denver-area stores nearly two months before Friday's shooting and that he received at least 50 packages in four months at his home and at school.
Holmes' apartment was filled with trip wires, explosive devices and unknown liquids, requiring police, FBI officials and bomb squad technicians to evacuate surrounding buildings while spending most of Saturday disabling the booby traps.
Weeks before, Holmes quit a 35-student Ph.D. program in neuroscience for reasons that aren't clear. He had earlier taken an intense oral exam that marks the end of the first year but university officials would not say if he passed, citing privacy concerns.
Also in June, the owner of a gun range in Byers rejected Holmes' membership application of a "bizarre - guttural, freakish" message on Holmes' voicemail.
Amid the continuing investigation of Holmes and his background, Sunday was a day for healing and remembrance in Aurora, with the community holding a prayer vigil and President Barack Obama telling victims' families that "all of America and much of the world is thinking about them."
The pastor for the suspect's family recalled a shy boy who was driven to succeed academically.
"He wasn't an extrovert at all. If there was any conversation, it would be because I initiated it, not because he did," said Jerald Borgie, senior pastor of Penasquitos Lutheran Church. Borgie said he never saw the suspect mingle with others his age at church. He last spoke with Holmes about six years ago.
"He had some goals. He wanted to succeed, he wanted to go out, and he wanted to be the best," Borgie said. "He took pride in his academic abilities. A good student. He didn't brag about it."
The shooting was the worst in the U.S. since the Nov. 5, 2009, attack at Fort Hood, Texas. An Army psychiatrist was charged with killing 13 soldiers and civilians and wounding more than two dozen others.
Associated Press writers Kristen Wyatt and Thomas Peipert in Aurora; Dan Elliott, and Colleen Slevin in Denver; and Julie Pace in Washington contributed to this report.