Kempton Bunton (1900–1976) was a disabled British pensioner who apparently stole Francisco Goya's painting Portrait of the Duke of Wellington from the National Gallery in London in 1961.
A National Archive file released in 2012 revealed that Kempton's son, John, had confessed to the theft in 1969.
Read more about Kempton Bunton: The Motive, Theft of The Painting, Return and Prosecution