Joint Investigation Into Several Drug Overdoses Including One That Was Fatal Has Led To Charges Against A Johnson City Man. 31 Year Old Tyrique Brown Is Charges With Second Degree Murder, Three Counts Of Sale Of A Schedule II Drug And Three Counts Of Distribution Of Schedule II Drugs. The Investigation Was Launched By The Sullivan County Sheriff’s Office And The TBI In September Of 2022 When 22 Year Old Isaiah Coleman Was Found Dead Of A Suspected Overdose Outside Of A Home In Piney Flats. Brown Was Taken Into Custody On Thursday And Booked Into The Washington County Detention Center.