Once his condition stabilised, Verwoerd was transferred to a Pretoria Hospital. The neurologists who treated Verwoerd later stated that his escape had been 'absolutely miraculous'. Specialist surgeons were called in to remove the bullets. At first, there was speculation that Verwoerd would lose his hearing and sense of balance, but this was to prove groundless. He returned to public life on 29 May, less than two months after the shooting. David Pratt was initially held under the emergency regulations, declared on 30 March 1960, nine days after the Sharpeville massacre and shortly after Verwoerd received a death threat with a red note reading, "Today we kill Verwoerd". Pratt appeared for a preliminary hearing in the Johannesburg Magistrates' Court on 20 and 21 July 1960, once it was clear that the attempt was not fatal. Pratt claimed he had been shooting 'the epitome of apartheid'. However, in his defence, he stated he only wanted to injure, not kill, Verwoerd. The court accepted the medical reports submitted to it by five different psychiatrists, all of which confirmed that Pratt lacked legal capacity and could not be held criminally liable for having shot the prime minister. On 26 September 1960, he was committed to a mental hospital in Bloemfontein. On 1 October 1961, his 53rd birthday, he committed suicide, shortly before parole was to be considered. In 1961, UN Secretary-General Dag Hammarskjöld visited South Africa where he could not reach an agreement with Prime Minister Verwoerd. On 6 November 1962, the United Nations General Assembly passed Resolution 1761, condemning South African apartheid policies. On 7 August 1963, the United Nations Security Council passed Resolution 181 calling for a voluntary arms embargo against South Africa, and in the same year, a Special Committee Against Apartheid was established to encourage and oversee plans of action against the authorities. From 1964, the US and UK discontinued their arms trade with South Africa. Economic sanctions against South Africa were also frequently debated in the UN as an effective way of putting pressure on the apartheid government. In 1962, the UN General Assembly requested that its members sever political, fiscal and transportation ties with South Africa. The National Party under Verwoerd won the 1966 general election. During this period, the National Party government continued to foster the development of a military industrial complex, that successfully pioneered developments in native armaments manufacturing, including aircraft, small arms, armoured vehicles, and even nuclear and biological weapons. Three days before his death, Verwoerd had held talks with the Prime Minister of Lesotho, Chief Leabua Jonathan, at the Union Buildings in Pretoria.