During her initial interview on the Monday afternoon, she again described the details of David’s killing. The Principal Medical Officer, Dr. Mervyn Ralph Penry Williams, examined her and interviewed her twice, finding no evidence of mental illness. Ruth consented to and undertook an electro-encephalograph examination on the 3rd of May. This also failed to find any evidence of brain abnormality. While on remand in Holloway, she was also examined by Dr. D. Whittaker, a psychiatrist for the defence, on June the 4th and by Dr. A. Dalzell on behalf of the Home Office, on the 9th of June. Neither man found any evidence of insanity. Ruth discussed her feelings on the days leading up to and including the murder, with Dr. Dalzell, and he reported to the Home Office that he found no evidence of delusions, hallucinations or other form of mental illness. These examinations were required by law to ensure that Ruth was legally sane and therefore fit to plead at her trial.