Episode Detail: The Killing at Poplar River - DATELINE: Real Life Mysteries
Conclusion. The investigation into the 1979 slaying of 17-year-old Kim Nees, a high-school valedictorian in Poplar, Mont., is recalled. The case went unsolved until 1983, when police in Monroe, La., elicited a confession from former Poplar resident Barry Beach, who was 18 at the time of the murder. Beach was eventually convicted and sentenced to 100 years in prison, and contends that his confession was coerced.