Oldest Criminals In Prison At age 101, a former Nazi concentration camp guard became the oldest person ever convicted of war crimes. True False None Bernie Madoff, infamous for running the largest Ponzi scheme in history, died in prison while serving a 150-year sentence. True False None Oskar Gröning, known as the "Bookkeeper of Auschwitz," was convicted for Nazi war crimes at the age of 94. True False None Japan’s oldest inmate, Iwao Hakamada, spent over 50 years on death row before his conviction was overturned. True False None Theodore John Conrad, one of America’s most notorious bank robbers, escaped capture until his 70s. True False None Time's up Most Popular Most Popular