The document also revealed that a hired school security guard responding to the gunfire accidentally shot a female student. McKinney told police he threatened Erickson with an ax to get him to help open a gun safe using the ax and a crowbar. They targeted classroom 107 and Erickson told police he entered alone first, dropping off the guitar case. McKinney told police they entered the room simultaneously, yelling "nobody move," and he fired after hearing Erickson shoot. Erickson portrayed McKinney as a mastermind and told police repeatedly that that he wanted to stop his friend.

Source: ABC News June 21, 2019 05:10 UTC