According to authorities in Singapore, a city-state with one of the world's lowest crime rates, David Roach strolled into a Standard Chartered bank branch last July, handed the teller a scrap of paper and walked off with the cash.
The 28-year-old then fled to Bangkok where he was arrested a few days later in a hostel.
Today, a Thai criminal court convicted Roach of violating money laundering and customs laws by bringing the loot into the country.
Roach has been held in a Bangkok jail since his July 2016 arrest.
Bank robberies are extremely rare in Singapore, whose zero-tolerance stance to crime has made it one of Asia's safest cities.
Singapore and Thailand do not have an extradition treaty but share close diplomatic ties.
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