FAMOUS cold cases solved by modern enhanced DNA techniques include the murder of Nora Trott by builder Wayne Doherty, who at one point lived in Huntingdon. Mrs Trott, a dress shop owner, was raped and murdered in 1978. Twenty-five years later, DNA profiles found on her body and clothes were matched to Doherty's DNA. In another case, a child-killer was caught after 30 years when Brian Lunn Field from Solihull was arrested on a drink-driving offence in 1996. When his routine DNA was loaded onto the national database, it matched a crime scene stain taken in 1968. The body of a 14-year-old boy had been found raped and strangled in a wood in Surrey. The stain had been kept in a freezer for three decades. Lunn Field denied the charges at first but pleaded guilty at the Old Bailey in 2001.