The search for missing teacher Sherry Arnold came to a tragic end on Friday when her body was discovered.

Arnold, 43, of Sidney, Montana, had vanished around 4.30 a.m. on January 7 after going out for an early morning run. As RadarOnline.com previously reported, a detailed search carried out by the FBI and local police had so far uncovered just one clue to her disappearance, a single running shoe, despite extensive canine, air and horseback units covering the case.

Federal investigators announced on Friday that a suspect was in custody being questioned for the murder of the wife and mother.

Authorities are going door to door searching for clues into the disappearance of missing mom and beloved teacher Sherry Arnold.

The 43-year-old mother of five went for a run on Saturday, January 7 and hasn’t been seen since.  Police found a single running shoe in a ditch along her route in Sidney, Montana.

The FBI and local law enforcement are investigating the possibility that she was abducted from the town, which borders North Dakota, according to HelenAir.com/Independent Record.

Federal Agent Deborah Bertrand said tips were coming in about Arnold, but did not reveal any details.