2010 book The Lost British Serial Killer that Bible John was Tobin, his co-writer for the book Paul Harrison later recanted on the claims they made in the book. In 2013 Harrison published a new book, instead claiming Bible John was a police officer. Aftermath No further murder victims killed in Scotland or elsewhere in the United Kingdom have ever been conclusively attributed to Bible John, and the manhunt for this murderer was one of the most extensive manhunts in Scottish criminal history. The murders of the three women remain unsolved, although the case remains open, with many investigators remaining certain that the perpetrator(s) of these crimes were highly likely to have been shielded by one or more individuals whom he had known. No uniform consensus exists that the three killings were actually the work of the same person. It has been claimed that the gap of 18 months between the first two killings is unusual for a serial killer, and that the later two murders may have either been copycat killings, or the sole two committed by the same perpetrator. Criticism has also been levelled against the police for potentially hampering their own investigation by prematurely jumping to the conclusion that all three murders had been committed by the same person. In 2004, police announced their intentions to genetically test a number of men in a further attempt to identify the perpetrator, with all individuals concerned being requested to submit blood samples. This endeavour followed the previous discovery of an 80% genetic match from the semen samples retrieved from the final crime scene attributed to Bible John with a DNA sample retrieved at the site of a minor crime committed two years earlier. The sample was enough of a match to lead officers to believe that the person who committed the offence was related to the killer. The sole witness ever to have engaged in a lengthy conversation with Bible John, Jean Langford, died in September 2010 at the age of 74. Langford had given police the description used to form the second composite drawing created of the suspect, which continues to remain the most significant clue as to the perpetrator's physical appearance. Despite Professor Wilson's assertion that Peter Tobin may have been Bible John, when Jean Langford discussed her sister's murderer many decades later, she dismissed this theory, stating emphatically that Tobin had not been the man with