[MUSIC] Our final case about fibres is the case of Sarah Payne. Sarah was eight years old when she disappeared, and her body was found two weeks later out in the countryside, found by a dog walker. Substantially decomposed, and could only be identified by DNA. The suspect was a man called Whiting. During the investigation, Whiting was actually in prison for a completely different offense - dangerous driving - and that gave the police plenty of time to search, really search his van. Fibres proved to be very important in this case. They found many many fibres on the strap of Sarah's shoe. This is one of those shoes which uses a Velcro strap, and fibres get tangled in the Velcro very easily. So in the Velcro strap, they were able to find 350 fibres. But most of those fibres had no evidential value at all, because they were fibres from her own clothes. However, among those 350 fibres, they found four fibres which came from a red sweatshirt owned by Whiting. Now, how did they know that the sweatshirt was Whiting's? Because they could get DNA from the sweatshirt, and that proved it was his. In addition, they were able to find fibres in Sarah's hair, and these variously matched the sweatshirt, some socks and the van seat of Whiting's van. Further, on searching the van, they found 40 fair hairs, the same colour as Sarah's hair. From those 40 hairs, one of them gave a DNA result, and the DNA of the hair matched Sarah's DNA. All this fibre evidence, the fibres from the clothes and the hair, is very strong evidence linking Whiting with what happened to Sarah Payne. One aspect of this story is the enormous effort it took to build a case. It's not like C.S.I. on television, where the case can be solved in 25 minutes, including commercial breaks. An enormous number of scientific tests were done. The investigation involved an enormous number of people, it took a very long time, and cost a great deal of money. The result is that Whiting was sentenced to life in prison. So to sum up, if we want to identify fibres, we can use microscopy and spectroscopy techniques. We can use spectroscopy on both fibres as well as any dyes or other chemicals that were in the fibres. When it comes to hair, we can use microscopy to determine which species that hair came from. And by comparison, we can get some idea of whether the hair came from a particular individual. Though of course, comparison of hairs is far inferior to DNA technology. [BLANK_AUDIO]