James Holmes made his first court appearance in the Arapahoe County Courthouse in Centennial, Colo., courthouse at 9:30 a.m. Mountain time (11:30 a.m. EDT) Monday, giving the world its first look at the man said to be responsible for last week's slaughter at a movie theater, one of the worst mass killings in the state's history.

Holmes, a 24-year-old former medical school student, appeared dazed and deranged, with his eyes at times downcast.

Dressed in a maroon jailhouse jumpsuit, the Colorado shooting suspect is being held on suspicion of first-degree murder and will be formally charged July 30.

While 18th Judicial District Attorney Carol Chambers told the Associated Press on Monday her office is considering pursuing the death penalty against Holmes, she cautioned that it will be months before a decision is made on capital punishment.

As psychological experts are weighing in on what they believe Holmes's deranged looks indicate, Chambers declined to comment on whether his expression may have been an effect of psychiatric medication or illicit drugs.

Click 'start' to check out pictures of other dazed and confused serial killers in the courtroom.

James Eagan Holmes is the 24-year-old suspected perpetrator of a mass shooting at a movie theater that occurred on July 20, 2012, in Aurora, Colorado. He has no known prior criminal record

Aileen Wuornos was a serial killer who killed seven men in Florida in 1989 and 1990. Wuornos claimed that her victims had either raped or attempted to rape her while she was working as a prostitute, and that all of the killings were committed in self-defense. She was convicted and sentenced to death for seven of the murders and was executed by the State of Florida by lethal injection on October 9, 2002.

Ted Bundy was a serial killer, rapist, kidnapper, and necrophile who assaulted and murdered numerous young women and girls during the 1970s and possibly earlier. Bundy confessed shortly before his execution to 30 homicides committed in seven states between 1974 and 1978.

Richard Ramirez is a convicted serial killer awaiting execution on California's death row at San Quentin State Prison. Prior to his capture, Ramirez was dubbed the "Night Stalker" by the news media.

Charles Manson was the leader of the Manson Family, a quasi-commune that arose in California in the late 1960s. He was found guilty of conspiracy to commit the murders of Sharon Tate and Leno and Rosemary LaBianca carried out by members of the group at his instruction. He is still in prison.