Citing the Bronx District Attorney’s Office failure to disclose an informant’s testimony in the 1995 slaying of a retired police officer, a judge has ordered a new trial for a man who has spent 20 years in prison for the crime.

Edward Garry was sentenced to 25 years to life for the death of retired New York City detective Oswald Potter, who was shot during the robbery of an illegal gambling operation in a bodega.