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 her own life. A. 38-caliber revolver and a suicide note were found near her body, seemingly closing the book on a tragic domestic dispute. For years, this remained the accepted narrative, leaving friends and family to grapple with the shocking turn of events.
The case, however, was far from closed. The truth remained buried for over two decades, a dark secret held by the family's patriarch, Robert Spangler. While he initially told authorities he was at work during the killings, lingering suspicions and a web of subsequent tragedies would eventually unravel his carefully constructed facade. In 1993, his third wife, Donna, died after falling from a ledge in the Grand Canyon. Then, in 1994, his second wife, Sharon, from whom he was divorced, died of a drug overdose while living in his home. These events cast a long shadow of doubt on Robert Spangler and prompted investigators to take a renewed look into the cold case of his first family's demise.
The breakthrough came in 2000, when a terminally ill Robert Spangler, facing his own mortality with a cancer diagnosis, confessed to the murders of his wife and two children. He admitted to staging the scene to appear as a murder-suicide, driven by a simple and chilling motive: he was unhappy with his family life and saw murder as an easier path than divorce. His confession extended to the murder of his third wife, Donna, whom he admitted to pushing off the cliff in the Grand Canyon. Spangler's shocking admissions brought an end to the 22-year-old mystery, revealing a cold-blooded killer who had masqueraded as a grieving husband and father. He was arrested and ultimately pleaded guilty to the murder of his third wife and confessed to the murders of Nancy, David, and Susan as part of a plea agreement. Robert Spangler was sentenced to life in prison, where he died of cancer in 2001.
