An armed man found dead at an amusement park researched mass shootings. His plan is still a mystery

A heavily armed man who was found dead at a Colorado mountaintop amusement park last year had researched mass shootings online, but authorities say they still haven’t determined why he amassed such an arsenal or didn’t follow through on “whatever he wa…

​ABC News: US A heavily armed man who was found dead at a Colorado mountaintop amusement park last year had researched mass shootings online, but authorities say they still haven’t determined why he amassed such an arsenal or didn’t follow through on “whatever he wa…