CENTENNIAL — Aurora theater shooting suspect James Holmes received six deliveries from an online ammunition vendor and had other packages sent to his apartment “on an almost daily basis” in the weeks before the mass murder, search warrants unsealed Wednesday show.

Aurora police detectives sought Holmes’ shipping and delivery records, believing they would reveal purchases of weapons, ammunition, body armor, chemicals and explosives used in the July 20 attack at the Century Aurora 16 movie theater. Arapahoe County District Court Judge Carlos A. Samour Jr. also unsealed four other applications for police to pore over Holmes’ financial, phone and e-mail records as well as his iPod touch.

Holmes is charged with 166 counts of murder, attempted murder and other offenses in connection with the shooting, in which 12 people were killed and 58 more were wounded by gunfire. He has formally asked to change his plea to not guilty by reason of insanity. Both sides will argue over the constitutionality of a number of insanity-plea rules at a hearing Thursday before a judge can decide whether to accept Holmes’ plea change.

Detectives were trying to learn about Holmes’ “culpable mental state” when they asked a judge to let them search his property. Detective Mark Yacano told a judge he believed the iPod alone would provide clues about his planning and purchases as well as “communications between the suspect in this case and other potential suspects,” according to one of the applications.

In another document, a FedEx security officer told police there had been 10 deliveries to Holmes’ apartment on Paris Street in Aurora between February and July 2012. Two other deliveries were to Holmes’ parents’ home in San Diego.

FedEx identified six packages from BulkAmmo.com, which says it offers “the best deals to the most serious shooters.” Holmes placed the orders on June 28. Police who searched his apartment after the shooting found trip wires, propane tanks, and bottles filled with liquid and ammunition.

Wednesday’s release offered few new glimpses into the investigation, as much of the information was detailed in court hearings earlier this year. The Denver Post and other media outlets sued to have the documents unsealed.

Sadie Gurman: 303-954-1661, sgurman@denverpost.com or twitter.com/sgurman