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JACKSONVILLE (CBSMiami/AP) — A Florida man convicted of shooting and killing a teenager during an argument over loud music outside a Jacksonville convenience store has been sentenced to life in prison without parole.

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A life sentence was mandatory for 47-year-old Michael Dunn after prosecutors did not seek the death penalty.

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Dunn was convicted of first-degree murder at a second trial in September after jurors deadlocked on the charge at his initial trial in February. Prosecutors say Dunn, who is white, fired 10 times into a sport utility vehicle carrying black teenagers in November 2012, killing 17-year-old Jordan Davis of Marietta, Georgia.

At his first trial in February, Dunn was convicted of three counts of attempted second-degree murder for which he already faced at least 60 years. He claimed self-defense.

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