"The blood samples taken from ... Davis ... at Walthamstow on 18 May 1974 were passed on to the Yard's Senior Scientific Officer, Peter Martin, on 21 May and he reported his negative findings to the police officer in charge of the case on 20 June. At as late as November 1974 on a third bail application, this time before a judge in chambers, and after committals had been completed (28 October) the police were saying that they still awaited the blood results from forensic."