Colepaugh quickly lost his commitment to espionage, and hoping to avoid the death penalty for treason, turned himself in to the FBI and betrayed his partner Gimpel, effectively ending the operation in late December 1944. In February 1945, the two agents were convicted of espionage by a military court and sentenced to death. At the time, the military tribunal which named American citizens in a conspiracy to commit treason was only the third of its kind ever held in the history of the US. When the war ended, their sentence was subsequently commuted to life imprisonment by President Harry S. Truman. Gimpel was paroled in 1955. Colepaugh was paroled in 1960.