Criminology and Psychology

  There is an old proverb which says: "As a dog returns to its vomit, so a fool repeats his folly." Tammy Kingdon's folly was to return to Troy Mercanti on more than a dozen occasions during their tumultuous 16-year relationship. The final result was that she became, at least as far as the underworld is concerned, a dog - the derogatory term reserved for anyone who gives information to police. It was the prolonged brutality of Mr Mercanti's alleged attack on January 6 which turned the unerringly loyal Ms Kingdon against him. Her lawyers told the Perth District Court last year, after Ms Kingdon was convicted of stealing, that she was a victim of regular physical abuse and had once had her teeth knocked out and an eye socket broken. But she stayed with him anyway. This time it was different. She wasn't beaten because of a drunken quip or because of an argument. Police sources say Mr Mercanti believed Ms Kingdon had been cheating on him with another man. She was...