A wealthy businessman on Thursday became the head of Haiti’s transitional presidential council tasked with restoring order in the troubled country as a top gang leader underscored the challenges facing the nation by vowing to overthrow the government.

The United States announced criminal charges against Haitian gang leader and former police officer Jimmy Barbeque Cherizier and a North Carolina man on Tuesday for conspiring to violate U.S. sanctions.

The State Department is offering a $5 million reward for information leading to Chérizier’s arrest or conviction.