There's reason to believe the man accused of being "The Dark Knight Rises" shooter was planning an attack. Police said Saturday that suspect James Holmes received a high volume of deliveries at work and home over the past four months, and that they believed the packages contained ammunition and possibly bomb-making materials.
Aurora Police Chief Dan Oates revealed the shipments as authorities gathered evidence at Holmes' apartment, which was found to be booby-trapped with explosives following the massacre at the multiplex theater several miles away.
Oates said residents of nearby buildings who were evacuated would likely be allowed to return home on Saturday night.
"We've become aware that the suspect over the last four months received a high volume of deliveries to both his work and home addresses," Oates said at an afternoon press conference.
"This begins to explain how he got his hands on all the magazines and ammunition," Oates said. "We also think it begins to explain some of the materials he had in his apartment."
Holmes was due to make an initial court appearance on Monday.
Authorities used a remote-controlled robot and controlled detonation on Saturday as they neutralized what they said were a series of booby traps in Holmes' apartment.
The bomb squad used a robot to place a tube -- known as a "water shot" -- near an explosive device in the apartment. The water shot was then detonated to disable the explosive.
Photos of the apartment, taken by a camera raised up to the third-floor window, showed jars of ammunition on the floor and "things that look like mortar rounds," Oates said.
There were also bottles filled with an unknown liquid and what appeared to be trip wires laid out across the apartment, he said.
Of the 58 people wounded in the shooting, hospital officials said some patients had sustained serious head injuries and chest injuries.
The University of Colorado Hospital, which treated 23 victims of the shooting, told Reuters that 10 people had been released and five remained in critical condition.
The Medical Center of Aurora said of its seven patients -- ranging in age from 16 to 31 -- four remained in the intensive care unit and three other patients are on the main trauma floor.