- Colorado public safety’s search for mysterious drones comes up empty The Denver Post
- Colorado authorities say they found no criminal activity after an investigation into mysterious drone sightings CNN
- State plans to ‘scale back’ investigation of drones in northeast Colorado FOX 31 Denver
- Officials to ‘scale back’ operations investigating mystery drones over northeastern Colorado The Denver Channel
- Colorado drone sightings: No illegal, suspicious activity found in investigation Coloradoan
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