a criminal might externally disperse microscopic particles of the cornstarch formula. That’s what turned up on both the handle and the trigger of the weapon that killed Dr. O’Peele. It was a significant finding because a person who purposely shoots himself typically doesn’t worry about fingerprints, and therefore doesn’t don gloves before putting the gun barrel to his temple. In any event, the hands of Gomez O’Peele were bare when his body was discovered, and the only latents on the .357 came from two of the doctor’s right-hand fingers, which was instructive because his sisters reported he was
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