Josiah Colt, the man photographed swinging from a balcony inside the Senate chamber on January 6, pleaded guilty Wednesday to one felony charge of obstruction. In pleading guilty, Colt also agreed to cooperate with prosecutors. That’s a potentially significant development for the cases of riot suspects Ronald Sandlin and Nathan DeGrave, who prosecutors described Wednesday as Colt’s co-conspirators, although the men have been charged separately.