succession, had been its head. Witt and Abt were now law partners in New York City. Each was accompanied at his hearing by an attorney, Mr. Harold Cammer, a partner in the law firm of Nathan, Witt and Cammer. The firm changed its name briefly to Pressman, Witt & Cammer after Lee Pressman joined in 1948, But Pressman became caught up in the Hiss Case. HUAC began investigating Pressman and Witt (also a member of the group) and the stress began to wear Pressman down, even causing him to become paranoid to a degree. Pressmen left the firm peremptorily in 1949. Testifying again before HUAC in 1950, Pressman named Witt as a member of the CPUSA and the Ware group. Cammer represented Witt and fellow attorney John Abt before HUAC in the 1950 hearings. In 1951, Cammer joined more than half a dozen other lawyers in defending 17 Communist Party members, including Elizabeth Gurley Flynn. The communists were accused of charged conspiring to "teach and advocate violent overthrow" of the government. The other lawyers were: Abraham L. Pomerantz, Carol Weiss King, Victor Rabinowitz, Michael Begun, Mary Kaufman, Leonard Boudin, and Abraham Unger. Later, they were relieved by O. John Rogge, gangster Frank Costello's lawyer George Wolf, William W. Kleinman, Joseph L. Delaney, Frank Serri, Osmond K. Fraenkel, Henry G. Singer, Abraham J. Gellinoff, Raphael P. Koenig, and Nicholas Atlas. Later career Cammer's legal practice focused on labor law. Among his clients were the Congress of Industrial Organizations (CIO), the United Brewery Workers union, the Teachers Guild (a forerunner to the United Federation of Teachers of New York City), the Teachers Union (a local union which had been ejected by the American Federation of Teachers for being communist-dominated and which, in the 1950s, belonged to the United Public Workers of America), the International Union of Mine, Mill and Smelter Workers, the International Fur & Leather Workers Union, the Bakery, Confectionery and Tobacco Workers union, the International Woodworkers of America, the United Public Workers of America, and the Amalgamated Meat Cutters. In 1945, he also helped represent the Seamen's Joint Action Committee, a CIO-backed insurgent group which allied with three CIO longshoremen's unions to challenge corrupt International Longshoremen's Association president Joseph Ryan. In many cases, he represented union members and others who had been accused of being members of the CPUSA or harboring communist views. In 1968, Cammer played a different role