David Michael Ansberry

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CORRECTS MONTH TO JULY NOT JUNE- FILE - This Oct. 13, 2016, file photo shows the exterior of the police station in the town of Nederland, Colo. David Michael Ansberry pleaded guilty Tuesday, July 18, 2017, to planting a backpack bomb outside the police station in Nederland. Ansberry acknowledged his motive stemmed from the 1971 killing of his friend and fellow hippie by the town marshal. (AP Photo/Sadie Gurman, File)