A Queensbury man was sentenced to 13 years in prison after pleading guilty to a knifepoint robbery. WRGB reports 36 year old Justin M. Cabral pled guilty to felony first-degree robbery, for the knifepoint robbery of a clerk at the Speedway gas station on Aviation Road in Queensbury on the morning of fourth of July. A judge sentenced Cabral, a prior felon, to 13 years in State prison, with five years of parole after his release.