Hal's death was the subject of two inquiries: an internal one by the
Met Police and a Home Office (HO) inquiry. The allegation by Hal's friends was that the Met police had caused his death but both inquiries found that this was not the case. The Home Office inquiry did criticise some aspects of police behaviour. Hal was knocked down by a car in Park Lane, London and died of his injuries whilst in police custody. The Home Office inquiry was published by
HMSO in March 1964. The inquiry papers and the police files have been available at the
UK National Archives since 1995. The accident occurred at approx 5:30pm at the south end of Park Lane approximately opposite Achilles Way on the southbound carriageway. The inquiry assumed Hal was crossing from the East side. Park Lane was being remodelled at the time but this section was similar to the way it was in 2022. The inquiry papers include a map of the location with the position of witnesses. Pedestrians continued to be involved in accidents on Park Lane throughout the 1960s as not everyone used the new subways. At the time of Hal's accident the traffic was very heavy with several lanes of traffic, it was drizzling and dusk or dark though the carriageway was well lit. Hal was knocked down by an
E Type Jaguar registration number 773 ELH driven by Mr Ivor McLean. and the inquiry relied on his written records. The inquiry was unwilling to express any view with regard to Dr. Peters actions without him having an opportunity of explaining them. Attempts were made to contact his widow to see if she wished to be legally represented but it was found that she was in transit to
Southern Rhodesia, now Zimbabwe, and it was judged that further action was impracticable. The police failed to complete the correct paperwork so when Hal's friends reported him missing it was not identified that he was in police custody. The police also searched Hal's flat at 21 Bourne Terrace, Paddington without appropriate permission and charged him whilst he was semi-conscious. On all of these points they were criticised by the inquiry. On the afternoon of Sunday 11 November 1962, Hal was found in the detention room slumped on the floor and he could not be roused. Dr Peters was called and Hal was taken back to St George's Hospital. On arrival, he was examined and no injuries further to those recorded the previous day were recorded. At around 11pm on Monday 12 November 1962, Hal was taken to the
Atkinson Morley Hospital which is a specialist in head injuries. Two operations were performed on him but he died on 23 November 1962 at 10:10pm. He had been kept under police guard until 22 November when the guard was removed at the request of the hospital matron. Independent expert evidence to the inquiry said that Hal's head injuries incurred in the accident were unsurvivable. From the outset, the police were of the view that Hal was either drunk, under the influence of illegal drugs or both. However, no tests for alcohol or drugs are mentioned in the inquiry report or the released Police files. Meanwhile, Hal's friends, including Greta, had become concerned at his disappearance and reported him as missing on 15 November but this was to a different London police station to the one where Hal had been taken and the failure to follow procedures on arresting someone meant that the fact Hal was in police custody was not identified. Greta's phone number was in Hal's diary as the person to contact in case of an accident but the police did not do this. The Police said that Hal had said he wanted no one to be contacted. The arresting officer claimed not to have seen this diary. The police did copy out names, addresses and telephone numbers, including Greta's, from it His ashes were removed. == Inquest and inquiries ==