 GREENSBORO, N.C.--BUSINESS WIRE--National investor fraud law firm, KlaymanToskes KT, continues its investigation into potential securities claims on behalf of former and current Oppenheimer Co., Inc. Oppenheimer NYSE: OPY and Southport Capital customers who invested in Horizon Private Equity III Horizon through John Woods, a former Oppenheimer financial advisor. Oppenheimer customers recently learned about the massive, 100 million Ponzi scheme devised by former Oppenheime 