SIDNEY, Mont. -

A judge has accepted a plea deal between prosecutors and one of the men accused of killing a Montana teacher.
    
The plea agreement calls for Lester Van Waters Jr. to plead guilty to deliberate homicide by accountability in the January 2012 slaying of Sidney High School teacher Sherry Arnold.
    
In exchange, prosecutors are recommending a 100-year sentence that would spare Waters the death penalty and he will testify against co-defendant Michael Spell.
    
The Richland County clerk of court's office says District Judge Richard Simonton accepted the agreement at a Tuesday hearing in Sidney.
    
A sentencing hearing has not yet been set.
    
Prosecutors say Waters and Spell abducted Arnold while she was out for a morning jog. They are accused of killing her and burying her body in a North Dakota field.