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1970 tape recording of Kent State shootings reveals sound of pistol shots
A tape recording of the 1970 shooting deaths of four Kent State University students by Ohio National Guardsmen reveals the sound of pistol shots 70 seconds earlier, a newspaper reported Friday citing the work of a forensic audio expert.

The finding lends support to a theory that the guardsmen thought they were being shot at during a campus Vietnam War protest. Witnesses said at the time that an FBI informant monitoring the protest fired warning shots because he felt threatened. ...