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In crime dramas and in real life, criminals try not to leave their DNA at the scene of the crime. How accurate is DNA profiling, and to what extent can it be used on tiny or degraded samples? What are the limitations of DNA profiling, and what are the risks that it can be misapplied?

Dr Graham Williams will speak about his research on the use of DNA and RNA in forensic investigations. He will discuss possible ways of extending the capabilities of DNA profiling. For example, he will explain how it is possible to differentiate between identical twins, even though they have the same DNA profile.

Dr Graham Williams heads the Forensic Genetics Research Group at Huddersfield University. His areas of specialism include the use of RNA for body fluid identification; and bloodstain pattern analysis. He also appears as a forensic expert witness in court cases.