MT.V.HUNT VITOCUSUMANOIN SHOOTINGJoseph Bommarito Killed Following Argument on Commission Row; Driver Tells of Cusumano Threats.By Associated PressST. LOUIS, Aug. 27.—Joseph Bommarito, 43, produce dealer from Mt. Vernon, 111,, was shot and killed last night following an argument with another dealer, police reported.Police Sgt. Edward Peiker, acting lieutenant for the Carr Street Station, said police are seekingVito Cusumano of St. Louis. No charges have been filed. Bom-marito formerly worked for Cusumano.Peiker quoted Laverne Craw-fnrrl Wcrrn trnrlr Hriv*»r fnr Pikii.