Between 1954 and 1957, violence, murders and bombings, orchestrated largely by the National Liberation Movement (NLM), attended much of the political life in the Gold Coast. However, the proximate incident that triggered the introduction of preventive detention, first proposed by the late Krobo Edusei – whose sister had been killed by N.L.M. terrorists and whose wife had been the victim of an N.L.M. bomb blasts – was the planned assassination of the Prime Minister by Modesto Apaloo, R.R. Amponsah and an Army Commandant, Captain Awhaitey. The former two, both members of parliament, were arrested on November 10, 1958 for their plot to kidnap and assassinate the Prime Minister and other key cabinet ministers.