Expert: Trayvon Martin’s DNA not on the gun

Evidence submitted at George Zimmerman’s murder trial Wednesday showed none of his DNA under Trayvon Martin’s fingernails, and none of Martin’s DNA on the gun the neighborhood watch volunteer used to kill the unarmed teenager.

The prosecution in the closely watched Florida murder case had been expected to finish its case on Wednesday, but the complicated scientific evidence on DNA and the detailed cross-examination kept the proceedings going through the afternoon. The trial resumes Friday morning after the sequestered jury takes a day off for the Fourth of July.

Zimmerman, 29, is charged with second-degree murder in the shooting of Martin, 17, during a confrontation in a gated community in Sanford, Fla., on Feb. 26, 2012. Zimmerman insists he shot Martin in self-defense after the two fought.

The extent of the pair’s battle and the injuries Zimmerman sustained have been under the legal microscope for days as the sides battled over details and what evidence would, or would not, support his self-defense claim.

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