Magician David Copperfield secrets now open to public Having been sued for allegedly caused the injury of an audience, magician David Copperfield has been forced to reveal the secret of one of his signature tricks. Gavin Cox claims he suffered lasting brain and body injuries after agreeing to take part in the “Lucky #13” illusion in 2013. Mr Cox, who had previously cooked for the Royal Family, has not worked since he fell over while being led through a secret passageway at the MGM Grand in Las Vegas. The 57-year-old and 12 other...