A Sullivan County Grand Jury Has Indicted A Kingsport Man For Allegedly Sexually Assaulting A Martial Arts Student At His Business. 64-Year-Old Joseph Frank Grosso Is Charged With Six Counts Of Aggravated Sexual Battery And Three Counts Of Continuous Sexual Abuse Of A Child. A Female Victim Told Investigators She Had Been A Student At Grosso Martial Arts And Alleged Multiple Incidents Where He Sexually Abused Her While She Was Taking Lessons. Grosso Remains In Jail On A 200 Thousand Dollars Bond.