One division of the Department of Justice is in town with the goal of preventing any more rioting in Ferguson as the Michael Brown investigation continues.
Suspect later caught in St. Louis, officer treated and released.
William Lawrence had been tased during scuffle with police last month.
Nakie Wilson faces multiple counts of assault.
Both officers suffered minor injuries.
Charge alleges suspect was armed with knife, lunged at officers when he was shot.
Anthony Doll was shot multiple times, survived.