The rapper's attorneys cited credibility issues with a police officer who testified in his case. District Attorney Larry Krasner's office agreed to the new trial, saying it had no confidence in the officer's testimony.
Judge Genece Brinkley said in an opinion Monday that Mill had not met his burden of proof in questioning the officer's credibility.
A different Philadelphia judge has granted new trials in at least three other cases involving the officer's testimony.
Brinkley sentenced Mill in November to 2 to 4 years in prison for violating probation. Mill served five months before the state Supreme Court ordered his release.
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