James Holmes purchased 6,000 rounds of ammo from an online retailer before he allegedly opened fire in an Aurora, Colo., movie theatre last July, killing 12 people and injuring 58 others, court records revealed on Wednesday.
The tidbits come in search warrants unsealed at the direction of the judge overseeing the case against Holmes, who could be executed if convicted of the July 20 shooting, the Associated Press reported.
The warrants show that in the hours after the attack, investigators wanted to search Holmes' bank records and an iPod Touch. They found that Holmes had received ammunition from the website BulkAmmo.com at his apartment in Aurora.
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Authorities wanted to determine whether he had received other material at the nearby University of Colorado, Denver where he had been a neuroscience graduate student or at his parents' home near San Diego.
Detectives also wrote that on July 9, Holmes downloaded a U.S. Postal Service form to track shipments. That was around the time Holmes shipped a notebook and burnt $20 bills to his former psychiatrist at the university. That package was not found until after the shooting. The notebook's contents have still not been disclosed.
The documents released Wednesday didn't show what investigators found. They did say that Holmes carried an iPhone that contained pictures of the theater where the massacre occurred. Included in those pictures were images of the door jamb at the theater.
Prosecutors have said Holmes entered the theater that night apparently unarmed, slipped out the external exit door then returned with his weapons and body armor.
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Holmes is attempting to plead not guilty by reason of insanity. He's due to appear in court Thursday for a routine hearing.
The release on Wednesday consisted of documents that were omitted from a much larger document disclosure that occurred last April days after the mass shooting. At the time, various news outlets sued to have search warrants and affidavits associated with the case unsealed.
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