Flynn launched a campaign for their release but, in June 1951, was herself arrested in the second wave of arrests and prosecuted under the Smith Act with sixteen other Communist Party members. They were accused of charged conspiring to "teach and advocate violent overthrow" the government. Original lawyers included: Abraham L. Pomerantz, Carol Weiss King, Victor Rabinowitz, Michael Begun, Harold I. Cammer, 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. After a nine-month trial, she was found guilty and served two years in Federal Prison Camp, Alderson near Alderson, West Virginia. She later wrote a prison memoir, "The Alderson Story: My Life as a Political Prisoner".