CHICAGO — More than two dozen people were injured in a “random” mass shooting in Highland Park on Monday morning, at least six of them fatally shot, about 15 minutes into the northern suburb’s Fourth of July parade, according to police and the Lake County Sheriff’s Office. The shooter, who police said began firing from a nearby rooftop, had not been caught or identified as of Monday afternoon and the area around the parade route remained an active crime scene, according to Lake County Deputy Sheriff Chris Covelli. He urged people to stay in their homes and be careful. “This person is not ident…