"Prior to (the detective) coming over, and one of the reasons he came over, is they had little or no forensic evidence for this murder," Bond said. Police are optimistic Bond's technique will bring them another step closer to solving the case. His method involves dusting the metal with a fine black powder that adheres to the corroded areas, allowing scientists to see the fingerprint.Ī detective from the police department in North Richland Hills, Texas, where Wilkinson lived in a gabled home with her husband, went to meet Bond late last year, Bond and the department said.īond was able to obtain a print from the shell casings in the Wilkinson case, meaning police could be able to discern who loaded the gun, if they can find a match, North Richland Hills Police Investigator Larry Irving told CNN. The corrosion is often impossible to see with the naked eye because it's so small - as small as a micron, which is a millionth of a meter, Bond said. "That sweat is in the pattern of the original fingerprint that was deposited," said John Bond, a forensic scientist for England's Northamptonshire Police and a researcher at the University of Leicester, who developed the technique. It works by detecting the minute corrosion of metal caused by sweat, which corrodes the metal in the shape of the fingerprint. The technique enables scientists to detect fingerprints on spent bullets and shell casings, even when the print had been wiped off.
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Now, a groundbreaking technique developed across the Atlantic Ocean in Britain may help Texas police and others to crack cold cases like this. They recovered the gun used in the crime a few months later, but the gunman's identity - and his motive - remain a mystery. The unsolved murder of Marianne Wilkinson, 68, in a town near Dallas, Texas, in December 2007 has left investigators with few clues and few leads.
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