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SIDNEY, Mont. — A Colorado man is set to plead guilty to killing a small-town Montana high school teacher.
A plea agreement with prosecutors filed Tuesday calls for a 100-year sentence for Michael Keith Spell, 25, on a charge of deliberate homicide for the 2012 death of Sherry Arnold. A charge of attempted kidnapping would be dropped.
Spell is due to appear Wednesday before state District Judge Richard Simonton in Sidney.
Prosecutors want the Parachute, Colo., man to serve his time in prison. Defense attorney Al Avignone said he will ask for Spell to be sentenced to the state health department, which could allow him to serve his time in a facility for the mentally disabled.
The defense also reserved the right to ask for a lesser sentence.
