The judgment of the International Court of Justice's Arrest Warrant Case attracts the following questions regarding Foreign Minister's diplomatic immunity: First, there is no distinction between official immunity and personal immunity. Second, the Court did not mention whether immunity can be invoked if one is involved in international crimes. Third, the Court does not comment on whether the dispute can be considered under the concept of universal jurisdiction. This study aims to discuss international legal implications on debates concerning diplomatic immunity after the Arrest Warrant case. It concurs with some Judges' individual opinions, and argues that the question of universal jurisdiction should be decided first, that is the key issue within the scope of the debate.