Official: Worker kills 2 co-workers at Roundy's; shooter also dead By Bret Lemoine and Amelia Jones Published Worker kills 2 co-workers at Roundy’s, shooter also dead A worker at a supermarket distribution center in Oconomowoc shot and killed two co-workers on Wednesday, a union official said. OCONOMOWOC, Wis. - A worker at a supermarket distribution center in Oconomowoc shot and killed two co-workers on Wednesday, a union official said. That official identified the shooter, who is also dead, as Fraron Cornelius, 41, of Wauwatosa. The shootings happened overnight in different locations inside the Roundy’s distribution center in Oconomowoc, about 30 miles west of Milwaukee, said Thomas Bennett, secretary-treasurer of General Teamsters Local Union No. 200. All three dead were men in their 40s.