The woman who digs the dirt to catch serial killers
Forensic soil scientist Prof Lorna Dawson is helping detectives solve decades-old murder cases.
As she stepped in to witness box at the trial Christopher Halliwell she knew the evidence she gave could help convict a man who police believed could be a serial killer.
Halliwell was accused of the rape and murder of 20-year-old Becky Godden in Swindon more than a decade ago.
Prof Dawson's job was to try to explain to the jury in a simple and unbiased way the evidence she was giving.
For instance, could soil found on a spade in Halliwell's home be the same earth found at the place where the body... read more
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