It sounds like you're talking about Dan Burros, a Jewish-American Neo-Nazi that committed suicide in 1965. After leaving George Lincoln Rockwell's American Nazi Party, joining an ANP offshoot, briefly associating with James Madole's National Renaissance Party (another Far-Right, White Nationalist organization). It was soon after leaving the NRP he met up with Robert Shelton, Imperial Wizard to the KKK, who appointed Burros Grand Dragon of New York.

It was during this time that HUAC (House Un-American Activities Committee) was targeting the KKK, Shelton, Burros, and other leading Klansmen were subpoenaed and forced to appear in court. Burros Jewish heritage was discovered by HUAC and the information quietly released to the New York Times who published this article Burros read the article, went to the house of Klansman Roy Frankhouser and shot himself once in the chest, and again in the head.