Mesadieu has been a political opponent of former Haitian president Jean-Bertrand Aristide.
He has been attacked in his home in December 2003 by thugs associated with Aristide, among them Amiot Métayer.
His assistant, Ramy Daran, was burned to death that day.
Mesadieu is an Evangelical pastor with two churches in the city of Gonaives.
He claimed to have been called to run for president by the voice of God in 2000.