Four people in Alabama have now been arrested on assault charges stemming from last week's viral riverboat brawl that drew widespread attention online. One day after Richard Roberts turned himself in over to police and was charged with two counts of third-degree assault, Mary Todd, Alan Todd, and Zachary Shipman have turned themselves in as well. Each were charged with one misdemeanor count of third-degree assault. The police chief said last week that more charges are likely.