Now we have Banksy. Each new stencil is greeted with the same mix ... Mary University used geographical profiling – the same technique employed to track “rapists, murderers and arsonists ...

Girl With Balloon, 2004. Courtesy of Pest Control Office, Banksy, London. One of Banksy's well-known pieces is called Sweep it Under the Carpet and was made in 2006 on a wall in London. It shows a ...