article_snippet.sent: A mentally disabled Colorado man was sentenced to 100 years in prison Friday for the murder of a Montana teacher whose death highlighted the downsides of an oil boom that's sweeping across the remote Northern Plains, bringing thousands of newcomers to the area.
article_snippet.sent: Co-defendant Lester Van Waters Jr. was sentenced in December to 80 years in prison on a charge of deliberate homicide by accountability.
article_snippet.sent: Sentenced to die behind bars:
article_snippet.sent: Co-accused: Lester Van Waters (left) was sentenced to 80 years in December.  
article_snippet.sent: Spell was sentenced to 100 years prison Friday for the murder of Mrs Arnold .
article_snippet.sent: Prosecutors recommended 100 years in prison and thus became Spell's sentence Friday.
highlights_snippet.sent: Prosecutors agreed A mentally disabled Colorado man was mentally ill but said A mentally disabled Colorado man could stand trial, recommending 100 years prison .