So far there have been 2 assassinations (Idriss Déby of Chad, Jovenel Moïse of Haiti).

Resolves according to this list: https://en.wikipedia.org/wiki/List_of_assassinated_and_executed_heads_of_state_and_government

Executions count too, if it ends up on this article it counts. Only incumbent heads of state, so Shinzo Abe's assassination doesn't count.

If the wikipedia list is deleted or has the criteria for inclusion significantly changed, resolves according to the same guidelines it has at market creation (deaths of incumbent heads of government/state from execution/assassination) as faithfully as possible according to my judgement.

I will not bet.