Next prosecutor to determine course of action on highly contentious Afghanistan, Israel-Palestinians probes

The International Criminal Court's member states will elect the new chief prosecutor on Friday, with four candidates -- Britain's Karim Khan, Carlos Castresana of Spain, Ireland's Fergal Gaynor and Italy's Francesco Lo Voi -- vying to replace the outgoing Chief Prosecutor Fatou Bensouda.

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British lawyer and human rights specialist Khan has been a defense lawyer in several ICC cases, including for late Libyan leader Moamer Kadhafi's son Seif al-Islam, also recently heading a special probe into the crimes conducted by the Islamic State terrorist group.

Spain's Castresana, a judge by training, previously headed a UN panel combating crime and corruption in Guatemala, but resigned in 2010 alleging "systemic attacks" by power-hungry officials.

Ireland's Gaynor has previously represented victims of crimes at the ICC in probes including the Afghan war investigation and a case against Kenyan President Uhuru Kenyatta.