"In May 2012, Holmes purchased a Glock 22, then bought the shotgun days later. After failing his oral exam, he bought a Smith & Wesson M&P15 semiautomatic rifle and a second Glock in July. He also purchased 3,000 rounds of ammunition for the pistols, 3,000 rounds for the M&P15, and 350 shells for the shotgun over the Internet, police have said."