Ted Arneault, the highly visible President and C-E-O of M-T-R Gaming Group Incorporated--- plans to step down at the END of the year.A spokes-woman for the company's flag-ship, Mountaineer Casino -- in Chester, W.V. says she has NO explanation for the move.Arneault--- has run the company for 13--- years and spear-headed its recent development--- of Presque Isle Downs & Casino-- in Erie County.