(USATODAY) — The Justice Department said its independent investigation found “insufficient evidence” to charge George Zimmerman with federal civil right violations in the shooting death of Florida teen Trayvon Martin.

Attorney General Eric Holder said the evidence did not meet the “high standard for a federal hate crime prosecution,” but the decision should not end efforts to explore racial tensions in the justice system. The decision closes the federal investigation.

“This young man’s premature death necessitates that we continue the dialogue and be unafraid of confronting the issues and tensions his passing brought to the surface,” Holder said in a statement. “We, as a nation, must take concrete steps to ensure that such incidents do not occur in the future.”

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