The final prosecution witnesses were the two doctors, Black and Christison; both said they suspected foul play, but that there was no forensic evidence to support the suggestion of murder.[116] There were no witnesses called for the defence, although the pre-trial declarations by Burke and McDougal were read out in their place. The prosecution summed up their case, after which, at 3:00 am, Burke's defence lawyer began his final statement, which lasted for two hours; McDougal's defence lawyer began his address to the jury on his client's behalf at 5:00 am.[118] Boyle then gave his summing up, directing the jury to accept the arguments of the prosecution.[119] The jury retired to consider its verdict at 8:30 am on Christmas Day and returned fifty minutes later. It delivered a guilty verdict against Burke for the murder of Docherty; the same charge against McDougal they found not proven.[lower-alpha 16] As he passed the death sentence against Burke, Boyle told him: