The story of the right measurement that caused injustice and the wrong measurement that did justice; How to explain the importance of metrology to lawyers and judges [Legal Metrology]

Peter Neil Hamkin is a peaceful bartender in Litherland, a small village north of Liverpool, in UK. On February 13, 2003, Scotland Yard collared him under indictment for murdering a 24 year-old lady named Annalisa Vincentini during a robbery attempt in Castiglioncello, a small village on the Tuscany coast, not far from Florence, Italy, on the previous August 19. His DNA nailed him. The police found it in the abundant trail of blood left on the crime scene: Annalisa´s boyfriend reacted to the robbery attempt and hit the mugger´s face with a stone, causing him to bleed freely.