Authorities say the four weapons recovered in a mass shooting at a movie theater were purchased by the suspect from retail gun stores in Colorado in the last two months.
Aurora Police Chief Dan Oates said nearly 7,000 rounds and multiple magazines for those weapons also were purchased online. He said all of the weapons and ammunition were possessed legally.
A federal law enforcement officer said suspect James Holmes bought a Glock pistol on May 22 at Gander Mountain in Aurora. The official spoke on condition of anonymity because the probe into the shootings is ongoing.
Gander Mountain said it is "fully cooperating" with the investigation.
A Missouri online seller of tactical police gear told the St. Louis Post-Dispatch that it sold more than $300 of equipment to Holmes on July 2.