In the quiet suburban landscape of Littleton, Colorado, the Spangler family home on South Franklin Way became the scene of a grim discovery on December 30, 1978. Inside, authorities found the bodies of 17-year-old David A. Spangler, his 15-year-old sister Susan, and their 45-year-old mother, Nancy. Each had been felled by a single gunshot wound. The initial investigation painted a sorrowful picture of a murder-suicide, with evidence suggesting Nancy Spangler had killed her children before taking
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