By Sarah N. Lynch WASHINGTON (Reuters) – Federal prosecutors on Monday asked a judge to dismiss criminal charges against a Capitol riots defendant and release him from jail, a rare admission in a court filing that the Justice Department had violated his legal right to a speedy trial. At the same time, however, prosecutors asked permission to refile the criminal charges again, saying that apart from the Oath Keeper militia members who are facing seditious conspiracy charges, the defendant is facing “the most serious offenses charged in relation to the attack on the Capitol.” In the filing, pros…