who is the longest person in prison?
Paul Geidel. Paul Geidel Jr (April 21, 1894 â May 1, 1987) was the longest-serving American prison inmate, whose sentence ended with his parole. After being convicted of second-degree murder in 1911, Geidel served 68 years and 245 days in various New York state prisons. He was released on May 7, 1980, at the age of 86.