The phrase "to sustain a conviction" means that someone is found guilty of a crime and that guilt is supported or upheld by evidence, arguments, or legal procedures. Full definition
While conviction is more important than affiliation, affiliation can help sustain conviction. (firstthings.com)
Upon appeal from a judgment of a state supreme court sustaining a conviction, this Court in this case takes the indictment as construed by the court below. (supreme.justia.com)
F) THE LAW 25 In order to sustain a conviction for Careless Driving, the Crown must prove that the defendant was driving either without due care and attention or without reasonable consideration for other persons using the highway. (yossithecriminallawyer.com)