Clean Sweep On the morning of December 30, 1978, in Littleton, Colorado, Robert Spangler lured his wife Nancy into the basement with the promise of a "surprise." He then shot her in the head with a .38 handgun. Going upstairs, he shot his teenage children, Susan and David. David was slow in dying, so his father finished him off by smothering him with a pillow. Cover Up Spangler had cunningly framed the crime scene, making it appear that his wife had shot their children and then herself. Now he was free to marry his new love, Sharon Cooper. A former high school athlete, he hiked the Grand Canyon with Sharon, who chronicled the trip in a book dedicated to her "soul mate," Spangler. But their happiness was short-lived. The marriage ended in a costly, messy divorce. Confession In April, 1993, when Spangler's third marriage to 59-year-old aerobics instructor Donna Sundling went sour, he took her hiking in the Grand Canyon and pushed her off a 140-foot drop to her death. In 1994, when ex-wife Sharon committed suicide, Spangler became the focus of intense police scrutiny. Wracked with brain cancer, he told all to investigators in the fall of 2000, detailing his shocking serial saga--the story of a two-time widower. . .and a four-time killer

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