Jedarrius Treonta Meadows was on trial in September 2015 for the February 2014 shooting death of Damion Bernard Clayton in Macon.
The judge declared a mistrial after jurors said they weren't making progress after about three hours of deliberation and a bailiff said things had become contentious in the jury room. The defense objected, arguing that three hours of deliberation wasn't unreasonable.
The following month, the defense argued a retrial would violate Meadows' constitutional protection against double jeopardy. The judge rejected that in June.
The Georgia Supreme Court ruled Monday that the mistrial ruling was improper and because of that Meadows cannot be retried under the double-jeopardy rule.
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