Prosecutors have said that Mr. Holmes, who had dropped out of a graduate program in neuroscience shortly before the shooting, engaged in elaborate preparations, including buying weaponry and body armor and booby-trapping his apartment.

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He was a doctoral candidate in the neuroscience program at the Anschutz Medical Campus in Aurora before he withdrew a month before the shootings.

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Mr. Holmes was a doctoral student in the neuroscience program at the University of Colorado, which he joined in June 2011.

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Holmes was a doctoral student in the neuroscience program at the Anschutz Medical Campus of the University of Colorado, Denver, in Aurora, until he withdrew a month before being arrested outside the bullet-riddled movie theater.

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Holmes withdrew from the neuroscience program in June, a month before the shooting, though gave no reason for his withdrawal, said Jacque Montgomery, a spokeswoman for the University of Colorado.

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Holmes was a doctoral student in Aurora, in the neuroscience program at the Anschutz Medical Campus of the University of Colorado, Denver, until he withdrew a month before being arrested outside the bullet-riddled movie theater.

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Holmes appears to have been accepted for admission, about the same time, to the University of Colorado's neuroscience program at the Anschutz campus in Aurora.

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Mr. Holmes entered the program in June 2011 and was one of six first-year neuroscience doctoral students.

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The move caught the attention of Samuel Beshers, the university's neuroscience program coordinator, who pointed Holmes application to a colleague in an e-mail.

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