Witness testimony of gun possession is sufficient proof to sustain a defendant’s armed habitual felon conviction, a unanimous Illinois Supreme Court ruled on Thursday.The justices affirmed the conviction of Jasper McLaurin, finding the standard of review in his case did not require prosecutors to present the alleged gun at trial to establish he had a gun.The court’s ruling, which reverses the appellate court, allows for a police officer’s unequivocal eyewitness testimony alone to establish gun possession …