The Trail Went Cold - Episode 481 - Mary Cooper & Susanna Stodden

About this episode

This episode explores the unsolved double homicide of Mary Cooper and Susanna Stodden, along with the murders of Patricia and Amanda Dixon.

July 11, 2006. Snohomish County, Washington. 56-year old Mary Cooper and her 27-year old daughter, Susanna Stodden, leave their homes in Seattle in order to go hiking on the Pinnacle Lake Trail over 60 miles away. Later that day, Mary and Susanna’s bodies are found alongside the trail after they have both been shot in the head and even though some of their clothing was removed, neither of them were sexually assaulted. For years, Mary’s husband is looked at as a potential suspect before he is officially ruled out, but even though a partial male DNA profile is eventually found under Susanna’s fingernails, it has not been matched to anyone. On this week’s episode of “The Trail Went Cold”, we explore a double homicide known as the “Pinnacle Lake Murders” which has gone unsolved for nearly 20 years. In addition, we’ll also discuss the unsolved murders of 25-year old Patricia Dixon and her five-year old daughter, Amanda Dixon, who also lived in the Seattle area and were both shot to death inside their motel room in Anaheim, California during a vacation to Disneyland in March 1984. If you have have any information about the murders of Mary Cooper and Susanna Stodden, please contact the…

People in this episode

Host: Robin Warder

Topics covered

• double homicide
• unsolved murders
• Pinnacle Lake Murders
• true crime
• Seattle area crimes

Keywords

• Mary Cooper
• Susanna Stodden
• Pinnacle Lake Murders
• Patricia Dixon
• Amanda Dixon
• unsolved crimes
• true crime
• homicide
• Seattle

Mentioned in this episode

Places: Snohomish County, Seattle, Anaheim, California

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• The Trail Went Cold - Episode 484 - Josh Warneke · May 27, 2026 · 1h 0m
• The Trail Went Cold - Episode 483 - Scott Hilbert and Steven Mylan · May 20, 2026 · 50 min
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• The Trail Went Cold - Episode 480 - Daffany Tullos · April 29, 2026 · 43 min