 However, as lignocaine is a pain-killer and as it was claimed that using potassium chloride with other pain killers could accelerate their analgesic effect, it could be argued that their combination could be considered as a medical treatment.Although Dr Lodwig was charged with murder, the prosecution offered no evidence at his trial.No-one involved in the case had anything but praise for Lawrence's highly professional defence, and criticism of Devlin was limited to Manningham-Buller's claim in parliament that Devlin had misdirected the jury, by telling them to disregard any possible injections not recorded in the nurses' notebooks.