Plamondon was indicted with John Sinclair in connection to the bombing of a Central Intelligence Agency office in Ann Arbor on September 29, 1968, a year after the founding of the group. Upon hearing on the left-wing alternative radio station WABX that he had been indicted, he fled the U.S. for Europe and Africa, spending time in Algeria with exiled Black Panther Eldridge Cleaver. After secretly re-entering the country, and on his way to a safe house in northern Michigan, he was arrested in a routine traffic stop, joining John Sinclair, who had been sentenced to nine and a half years in jail for violating Michigan's marijuana possession laws, in prison. Plamondon was convicted and was in prison when Sinclair was released on bond in 1971 while appeals were being heard on his case. Sinclair's unexpected release came two days after a large "Free John" benefit concert, with performances from John Lennon, Yoko Ono, Bob Seger, and Stevie Wonder, was held at the University of Michigan's Crisler Arena.