Oconomowoc warehouse shooting: No motive determined, officials say No motive found in Roundy’s Distribution Center shooting The investigation into the double homicide that occurred at Roundy's Distribution Center in Oconomowoc has concluded with no motive determined. OCONOMOWOC, Wis. - The investigation into the double homicide that occurred at Roundy's Distribution Center on March 16 has concluded, the sheriff announced Monday, May 3, with no motive determined. The shootings happened overnight in different locations inside the Roundy’s distribution center in Oconomowoc, about 30 miles west of Milwaukee. Law enforcement was called to the scene around 10:30 p.m. Tuesday, March 16 for an "industrial accident." They quickly realized it was something worse.