An Aurora police officer pulls down the crime scene tape allowing most residents back to their homes that are near the apartment of alleged gunman James Holmes, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of "The Dark Knight Rises." (AP Photo/Alex Brandon)

AURORA | Police have finished collecting evidence from the apartment where the Colorado shooting suspect lived, but residents are still not allowed back into the building because of chemical hazards.

An Aurora police officer pulls down the crime scene tape allowing most residents back to their homes that are near the apartment of alleged gunman James Holmes, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of “The Dark Knight Rises.” (AP Photo/Alex Brandon)
An Aurora police officer pulls down the crime scene tape allowing most residents back to their homes that are near the apartment of alleged gunman James Holmes, Saturday, July 21, 2012 in Aurora, Colo. Authorities reported that 12 died and more than three dozen people were shot during an assault at a movie theatre midnight premiere of “The Dark Knight Rises.” (AP Photo/Alex Brandon)

Aurora police said Sunday residents can retrieve personal items, but the building remains closed.

Investigators say they found a complicated array of booby-trapped explosives in the third-floor apartment where 24-year-old James Holmes lived. It took bomb experts hours to dismantle and dispose of the material.

Police don’t yet know when the residents will be allowed to go home.

Holmes is suspected of opening fire on a packed movie theater early Friday, killing 12 people and injuring 58.

Police say the theater will remain closed as a crime scene for up to a week.