Investigation Continues On Missing Death Of Missing Montana Teacher SIDNEY, Mont. - The FBI and local law enforcement officials are releasing few details surrounding the disappearance and reported death of a northeastern Montana math teacher who vanished a week ago. Sidney Mayor Bret Smelser says residents on Saturday would like to have more information but they understand an investigation is ongoing. Officials say 43-year-old Sherry Arnold disappeared Jan. 7 while on an early morning run along a truck route on the edge of the oil boom town that has about 5,500 residents. Authorities say two men in the Dakotas were being questioned in connection with the death. Names have not been released. FBI spokeswoman Deborah Bertram in an email Saturday to The Associated Press declined comment. Officials have not reported finding a body, and Smelser says no searches are planned. Sidney school officials posted a statement online saying they learned of Arnold's death Friday. The statement did not provide details.