An FBI firearms expert who extensively tested the murder weapon testified this morning that Joseph Duncan’s Browning 12-gauge shotgun could not fire accidentally, such as from being dropped, and that multiple tests showed that 5 pounds of pressure was required on the trigger to get the gun to fire. That suggests that Duncan’s first shot, which hit 9-year-old Dylan Groene in the stomach, was no accident, though that was what he led the boy’s sister to believe.

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