CLEVELAND, Ohio—Before Thomas Randele sold luxury cars and taught golf in suburban Boston, before he got married and had a family, federal marshals say he was Theodore John Conrad, who pulled off one of the biggest bank robberies in Cleveland’s history. The suspect’s disappearance was a mystery that lasted 52 years—a few months longer than he did. Conrad was a 20-year-old bank teller at the Society National Bank in Cleveland when he walked out at the end of his workday on a Friday in 1969 with a paper bag containing $215,000, authorities said. That’s the equivalent of more than $1.7 million in 2021 dollars. The theft wasn’t discovered until a few days later, and Conrad was never seen again. Authorities said Conrad had become obsessed a year earlier with the 1968 film “The Thomas Crown Affair” starring Steve McQueen about a bank robbery for sport by a millionaire businessman. Conrad …