article_snippet.sent: Michael Keith Spell, 25, of parachute, Coloradoparachute, ColoradoColorado, was sentenced following a hearing before state District Judge Richard Simonton in Sidney.
article_snippet.sent: Spell pleaded guilty in October to killing Sherry Arnold, 43, after attempting to abduct the popular math teacher as she was jogging near she home in 2012.
article_snippet.sent: Michael Keith Spell, 25, sits in state District Court in Sidney, Mont, Friday April 17, 2015, before being sentenced to 100 years prison for the 2012 murder of a 43-year-old teacher in the booming Bakken oil patch of Montana .
article_snippet.sent: In the days before Arnold's killing, Spell and Waters traveled to Sidney from Colorado, using crack cocaine throughout their journey, according to authorities and the men's previous testimony.
article_snippet.sent: During The defendants trip, Waters allegedly told Spell that using crack "brought the devil out in him" and began talking about kidnapping and killing a woman, according to an affidavit filed by prosecutors.
article_snippet.sent: Spell's attorneys alleged Waters threatened to kill Spell with a utility razor unless he went along with the kidnapping plan.
article_snippet.sent: After the pair spotted Arnold along a Sidney street, Spell tried to grab her, leading to a struggle in which Arnold was choked or otherwise asphyxiated, authorities said.
article_snippet.sent: Lester Van Waters (left) and Spell (right-in 2012) were under the influence of crack cocaine when He and Spell (right-in 2012) kidnapped and murder Arnold .
article_snippet.sent: Spell said during an October change-of-plea hearing that Spell was unsure if Spell or Waters had killed Sherry Arnold.
article_snippet.sent: Guilty: In this February 2012 photo, Spell, appears at a hearing in the Williams County Courthouse in Williston.
highlights_snippet.sent: Michael Keith Spell, 25, of parachute, Colorado, confessed at the time to pulling she into a car while his friend, Lester Van Walters Jr, strangled she .
  