The Nevin Art Collection

Mr Nevin, an attendant at the Victoria and Albert Museum in London, stole 2,544 items from the 1930s to the 1950s, according to records recently released by the National Archives in the UK.
He stole prints, oil paintings, musical instruments, ceramics, lacquer boxes, 98 Japanese swords and two imitation 18th century French tables. About 100 of the recovered items were irreparably damaged. The thefts went undetected for years because the museum amazingly had not done an inventory. Police found over 2,000 items at his home. Nevin got three years in prison.