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Story summary
- Denver authorities will not charge the parents of 16-year-old Desmond Holly in the Evergreen High School shooting.
- Investigators found no evidence the parents had gun access or stored it improperly.
- The revolver, a family heirloom kept in a locked safe, was reportedly taken by Holly.
- Holly's online activity reportedly included extremist content and fascination with past mass shootings, including Columbine.
