Opinion Poll 1 Week 1 - 1 Basic Ideas in Forensic Science Week 1 - 2 What is Forensic Science?
Week 1 - 3 Application of Forensic Science Week 1 - 4 Limits of Forensic Science Week 1 - 5 Locard's Exchange Principle Week 1 - 6 Roberto Calvi Case Week 1 - 8 Forensic Laboratories Ministrado por. Roderick Bates Associate Professor.
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Categories : American crime television series Discovery Channel shows American documentary television series American television series debuts American television series endings True crime television series. Hidden categories: All articles with unsourced statements Articles with unsourced statements from December A local man on the sex offenders' register soon became a suspect, his van seized and exhibits sent for forensic examination.
On 17 July Sarah's decomposing body was found. Following a targeted approach, the first breakthrough came in December when a link was made from fibres on Sarah's shoe to Roy Whiting's red sweatshirt. Further work was able to provide more evidence. A total of more than items were submitted for forensic analysis.
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Shortly after Sarah had disappeared, her brother Lee noticed a white transit-type van passing along the lane. Roy Whiting bought a white Fiat Ducato van a week before Sarah disappeared. They also found that plywood panelling installed by the previous owner in the back had been removed and the rear doors changed.
All the fibres were picked off one by one under a low-power microscope with a pair of fine forceps and retained under Sellotape. Later when a scientist was looking at the tapings from the red sweatshirt and the clown curtain she realised that the constituent sweatshirt fibres were unusually dark red and that they shed very readily.
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She then examined the fibres that had been picked off the Velcro of the shoe and saw four dark red fibres. After mounting a sample from the sweatshirt and comparing them under a high-power microscope, they were found to match and this was the first tangible evidence to link Sarah to the van.
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After finding these matching fibres all the fair hairs from the curtain and the sweatshirt were sent for DNA testing. From 40 hairs found, only one gave a result - a full profile matching Sarah.
The garment was taped for fibres and hairs and screened for body fluids blood, semen and saliva. The collar and cuffs were also tested and gave a full profile matching Whiting. All this has to be achieved before it can be said that fibres match.