Armed man found dead at Colorado mountaintop amusement park had researched mass shootings, police say

DENVER — A heavily armed man who was found dead at a Colorado mountaintop amusement park last year had researched mass shootings online, but investigators haven’t determined why he amassed such an arsenal or didn’t follow through on “whatever he was planning,” authorities said Thursday. The Garfield County Sheriff’s Office said in a written update on its investigation that it was “unable to uncover any motive for Diego amassing such a lethal arsenal nor did it explain what happened to change his mind and why he did not follow through with whatever he was planning.” Despite the 911 call’s description, no alcohol or illegal drugs were found in his system and there was no evidence that he had been working with others or was a member of an extremist group, the sheriff’s office said. “In the end, Diego took his own life in the women’s restroom at the Amusement Park for reasons known only to him,” it said. “The Sheriff’s Office acknowledges that given amount of weaponry, ammunition, and explosive devices found, Diego could have implemented an attack of devastating proportions on our community resulting in multiple injuries and possibly death to members of the public as well as first responders.