U.N. urged to prepare North Korea case for alleged crimes against humanity

North Korean leader Kim Jong Un watches a performance given with splendor at the People's Theatre on Wednesday to mark the 70th anniversary of the founding of the State Merited Chorus in this photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on February 23, 2017. KCNA/via REUTERS

GENEVA (Reuters) - A veteran investigator urged the United Nations on Thursday to appoint an international legal expert to prepare judicial proceedings against North Korea's leadership for documented crimes against humanity.

His call came amid an international furore over the murder of Kim Jong Nam, the estranged half-brother of North Korean leader Kim Jong Un and critic of his rule, in Malaysia last month.