Robert Wittman, founder of the FBI’s art crime team: “[Thieves] read in the newspaper about about the growing value of paintings and the new records that are set every year by Cézannes and Picassos, and then they think that they can get a payday by going out and doing a heist. What they don’t understand is that the value of art is dependent on three things: authenticity, provenance – the history of the art – and legal title.”