Northern Rhodesia had been detained without trial, following claims that they had planned the indiscriminate killing of Europeans and Asians, and of African opponents, the so-called "murder plot". Shortly afterwards, on 12 March 1959, the governor of Northern Rhodesia also declared a State of emergency there, arrested 45 Zambia African National Congress including Kaunda and banned the party. Kaunda later received a 19-month prison sentence for conspiracy, although no credible evidence of conspiracy was produced. The declaration of States of emergency in both Northern Rhodesia and Nyasaland marked the end of attempts by their nationalist parties to work within the colonial system,
Northern Rhodesia Police stand off until troops of the Northern Rhodesia Regiment arrived, having been flown from Lusaka and order was fully restored. In 1935 Captain Wardroper moved his office to Lusaka, the new capital. In 1936 he retired as Commissioner after 21 years in the Force and was succeeded by his deputy, Harry Hart, who had joined the NRP as a constable in 1919 after war service in the Royal Artillery. In 1937 Detective Constable Ladell investigating a burglary at Victoria Falls took plaster casts of footprints, a recent development in police practice. Ladell followed a spoor for six miles and arrested