WASHINGTON (Reuters) – U.S. federal prosecutors warned on Tuesday there is still a chance they could bring additional criminal charges in their case against the Proud Boys over their roles in storming the U.S. Capitol last year, in a failed bid to block Congress from certifying President Joe Biden’s election victory. “We did indicate the possibility of a third” superseding indictment, prosecutor Luke Jones said during a virtual hearing in the U.S. District Court for the District of Columbia. “We obviously can’t speak for the grand jury or know exactly how things will transpire, but we also don’t want to...