victims unearthed from his Margate home's garden) did not suggest the work of an amateur. However, one discrepancy is that Bible John displayed his victims' bodies in public places, whereas Tobin buried all his known victims. Some contemporary visual similarities exist between Peter Tobin when aged in his 20s and the 1969 composite drawing of Bible John, although the composite drawing showed Bible John with red hair and contemporary pictures of Tobin show he did not have this hair colour. In addition, all three of Tobin's former wives have given accounts of being repeatedly imprisoned, throttled, beaten and raped at his hands, and each has stated he had been driven to extreme physical violence by the female menstrual cycle (a factor long suspected by investigators as being the perpetrator's actual motive behind the murders). In addition, Tobin is known to have been a staunch Roman Catholic with strong religious views, and the alias Bible John may have given to Jean Langford and Helen Puttock in 1969 is similar to one of the pseudonyms known to have been regularly used by Tobin: John Semple. Criminologist David Wilson actively investigated Tobin's case for three years and strongly believes the available evidence supports his theory that Tobin is Bible John. He has stated that the moment he believed Tobin was Bible John occurred during Tobin's trial for the 1991 murder of 18-year-old Dinah McNicol, one of the women whose bodies had been found in his Margate garden. The circumstantial evidence which Wilson uses to support this theory includes striking similarities between trial testimony from an acquaintance of McNicol's who had been in her company on the evening of her abduction and the conversation with Bible John that Jean Langford claimed to have had on the evening of her sister's murder; among the important points of overlap are both men mentioning they did not drink at Hogmanay and having a cousin who had once scored a hole-in-one in a golf match. This information—alongside other circumstantial evidence—has led Professor Wilson to state: "I didn't set out to prove Tobin was Bible John, but I would stake my professional reputation on it." Although DNA testing has been used to clear several suspects, detectives believe obtaining a forensic link between Peter Tobin and any of the murder victims linked to Bible John is unlikely, due to the deterioration of the physical samples, owing to poor storage. Operation