three previous investigations which did not lead to a prosecution, no charges were brought against the MP because of "insufficient evidence", although the Crown Prosecution Service (CPS) said in 2015 that Janner should have been tried. The 1991 interview was the only time Janner was interviewed by the police. Accompanied by his solicitor, Janner has been reported as having replied "no comment" to the questions put to him. Janner and his solicitor, Sir David Napley, were in contact with the barrister George Carman QC in anticipation of a defence brief needing to be prepared if Janner was put on trial. Carman and Napley were surprised no charges were brought against him because of the weight of evidence, according to Dominic Carman, the barrister's son. Further police investigations took place in 2002 and 2006; documents relating to Janner were not passed to the Crown Prosecution Service after the 2002 investigation. The former Director of Public Prosecutions, Lord Macdonald, told The Guardian in April 2015 that the penultimate CPS decision not to prosecute Janner in 2007 was actually made by officials in Leicestershire who did not contact head office in London about the case. In September 2014, The Times reported that Mike Creedon, currently the Chief Constable of Derbyshire Constabulary, claimed that in 1989, while he was serving as a Detective Sergeant, senior police chiefs severely limited his enquiries into paedophilia allegations against Janner, despite "credible evidence" which warranted further investigation. Fourth investigation and original CPS decision In 2013 and early 2014, Leicestershire Police searched Janner's home in north London and his offices in the House of Lords in connection with an enquiry linked to historical child abuse allegations. Janner insisted on his innocence. A file of evidence against Janner was sent to the CPS, but he was not interviewed by the police. On 16 April 2015, the CPS issued a statement indicating that they would not charge Janner owing to his poor health. During Leicestershire Police's Operation Enamel more than 20 men were interviewed who claimed Janner had abused them before they were adults. The CPS stated that the case met their evidential test for prosecution and they would have otherwise have prosecuted on 22 counts of indecent assaults and buggery, against nine persons which are alleged to have occurred between 1969 and 1988. They decided that it failed the public interest test, as Janner was diagnosed with Alzheimer's disease in