CENTENNIAL, Colorado - The suspect in the Colorado movie theater shootings has made his first court appearance -- though at times, he didn't seem to be there at all.

James Holmes was unshaven and appeared dazed. He sat virtually motionless during today's hearing in Centennial, Colo., his eyes drooping as the judge advised him of the severity of the case. At one point, he simply closed his eyes.

His hair was dyed a comic-book shade of orange-red. He didn't say a word during the hearing, letting his lawyers do all the talking when the judge asked if he understood his rights.

Prosecutors said later they didn't know if he was on medication. Authorities have said he is being held in isolation.

The hearing was 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.

Authorities say Holmes is refusing to cooperate with investigators, and that it could take months to identify a motive.

He's expected to be formally charged next Monday. A prosecutor says her office is considering pursuing the death penalty.