GREENVILLE, S.C. —Greenville police are investigating vandalism at a restaurant, an attempted robbery and an assault all in downtown Greenville. They believe teens from the same group are responsible for all three incidents. The general manager of Grill Marks told WYFF, a group of teens walked into the restaurant around 9:30 Wednesday night, spent a few minutes inside and then proceeded to the outdoor seating area where they squirted ketchup all over the tables, walls, and floors. They also smashed salt shakers on the street. Surveillance video captured the teens in the restaurant. "It's just a pain because we had...