Michael Dunn smiles at his parents during a break in his trial in Jacksonville, Fla. Wednesday, Feb. 12, 2014. Dunn is charged in the shooting death of Jordan Davis in November 2012. (The Florida Times-Union, Bob Mack, Pool)

JACKSONVILLE, Fla. (AP) — A Florida man convicted of first-degree murder for fatally shooting a teenager in an argument over loud music outside a Jacksonville convenience store has been sentenced to life in prison without parole.

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

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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