CASE FILE #BLPD-1978-12-30-001
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SOLVED

Robert Spangler

Serial Killer Family Murders

CLASSIFICATION: Serial Homicide

LOCATION

Littleton, Colorado

TIME PERIOD

1978-1994

VICTIMS

4 confirmed

CASE ACTIONS
AI ANALYSIS
OFFICIAL BRIEFING (FACT-BASED)

On December 30, 1978, in Arapahoe County, Colorado, Robert Spangler murdered his first wife, Nancy, and their two children, Susan and David, before staging the scene to appear as a murder-suicide. He later killed his third wife, Donna Sundling, in 1993 by pushing her off a cliff in the Grand Canyon. The case was solved with Spangler's confession, and he was sentenced to life imprisonment until his death in 2001.

COMMUNITY INTELLIGENCE (THEORY-BASED)

Theories surrounding Robert Spangler suggest that he may have been involved in the suspicious death of his second wife, Sharon Cooper, who died of a drug overdose shortly after they reconnected, raising questions about whether it was truly accidental or part of a pattern of his violent behavior. Additionally, speculation exists about the motivations behind his murders, particularly regarding the financial benefits he gained from the life insurance policies of his victims. Community discussions often focus on the meticulous planning he exhibited in staging the deaths to avoid suspicion, indicating a calculated approach to his crimes.

FULL CASE FILE

Robert Spangler

American Murderer

Robert Spangler (January 10, 1933 – August 5, 2001) is a name that resonates with horror and tragedy in the annals of American crime. This serial killer confessed to the brutal murders of his first and third wives, as well as his two children. He remains a figure of intrigue due to the chilling circumstances surrounding his crimes and the subsequent investigations. Spangler was also suspected of murdering his second wife, Sharon Cooper.

Quick Facts

  • Born: January 10, 1933, Des Moines, Iowa, U.S.
  • Died: August 5, 2001 (aged 68), MCFP Springfield, Springfield, Missouri, U.S.
  • Criminal Status: Deceased
  • Conviction: First-degree murder (18 U.S.C. § 1111)
  • Criminal Penalty: Life imprisonment
  • Victims: 4-5
  • Span of Crimes: 1978–1993
  • Country: United States
  • States: Colorado and Arizona
  • Date Apprehended: 2000
  • Imprisoned at: MCFP Springfield

The Horrific Murders

On December 30, 1978, in the quiet suburb of Littleton, Colorado, Robert Spangler executed a plan that would forever alter the lives of those around him. Luring his 45-year-old wife, Nancy, into the basement under the guise of a "surprise," he coldly shot her in the head with a revolver. But the horror didn’t stop there. He ascended the stairs and turned his gun on his teenage children, 17-year-old Susan and 15-year-old David. David, tragically, was still alive after the initial shot; Spangler smothered him with a pillow to finish the grim task.

In a twisted maneuver to manipulate the narrative, Spangler staged the scene to imply that Nancy had killed their children and then turned the gun on herself. Yet, the truth was far darker.

Fast forward to April 11, 1993. After his marriage to aerobics instructor Donna Sundling faltered, Spangler took her hiking in the Grand Canyon, ostensibly to patch things up. Instead, he pushed her off a 140-foot precipice, ending her life in a calculated act of violence. Just a year later, on October 2, 1994, he reconnected with ex-wife Sharon Cooper, who tragically died of a drug overdose. Spangler, who had taken out a life insurance policy on her, collected $20,000 from her untimely death—the only unnatural death among his significant others that he wasn’t charged for.

Life and Career

Spangler grew up in Ames, Iowa, where his father was a civil engineer, even lending his name to a laboratory at Iowa State University. He was active in sports during high school, where he met his first wife, Nancy. They married in 1955 and settled in Littleton, Colorado, welcoming their son David in 1961 and daughter Susan in 1963. By 1978, Spangler was employed by the American Water Works company, but his career was varied. He worked for Honeywell, served as a public relations director for a nonprofit organization, and even dabbled as a part-time disc jockey. He also had a passion for theatre, participating as an actor.

The Deaths of Wives and Children

The aftermath of December 30, 1978, revealed a chilling scene. The bodies of Nancy, Susan, and David were discovered in their home, each shot with a .38-caliber handgun. Nancy lay slumped over a typewriter, a bullet wound in her forehead, while Susan was found partially clothed in bed, shot in the back, and David in his chest. A typewritten suicide note, signed simply with Nancy's initial, was found at the scene, casting a dark shadow over the events of that fateful morning.

Initially, Spangler claimed he had left the house early, returning only after the grisly discovery. However, his account changed under scrutiny. Two private polygraph tests yielded inconclusive results regarding his involvement, but crucial evidence came to light: the murder weapon belonged to Spangler, and gunshot residue was detected on his right palm.

Despite the compelling evidence, the Arapahoe County coroner ruled the case a murder-suicide, and the sheriff's office was unable to counteract these findings, leading to the case's closure. In a chilling twist, Spangler married Sharon Cooper seven months later and moved into the house where his family had perished. Their relationship was fraught with tension, and after a divorce in 1988, Spangler married his third wife, Donna.

The Grand Canyon Incident

When Spangler and Donna trekked to the Grand Canyon in April 1993, he claimed she had fallen to her death while they were taking photos. However, the autopsy revealed she suffered massive injuries from the fall, including abrasions, contusions, and multiple fractures. The death was officially ruled an accident, and Spangler gained notoriety as a grieving husband appearing on national television, discussing the dangers of hiking.

After Donna's death, he rekindled his relationship with Sharon, only for her to be found dead from an overdose in his home in October 1994. Remarkably, this death was never investigated, and Spangler profited from her insurance policy.

Investigation and Confession

The investigation into Spangler’s past took a turn in January 1999, when cold case investigators from the U.S. Department of the Interior, National Park Service, and local authorities connected the dots between the suspicious deaths. They enlisted the help of the FBI, framing the case as one of insurance fraud and murder.

As they began to piece together Spangler's history, it became clear that he was a man of intelligence and charm, successful in various fields. The FBI agents were particularly intrigued by a letter sent to a woman in Colorado, in which Spangler mentioned having terminal cancer.

Faced with mounting evidence, investigators approached Spangler for an interview. They videotaped the session to ensure the confession could be used in court. Spangler's terminal cancer complicated matters, but he agreed to speak with them about his past.

During the hours-long interview, Spangler eventually confessed to the murders of his first wife and children, as well as the killing of Donna in the Grand Canyon. His chilling words, "You've got your serial," revealed the depth of his malevolence. He rationalized his actions as easier than divorce, painting a picture of a man who viewed life as disposable.

In federal court, Spangler pled guilty to first-degree murder for the death of Donna Sundling and was sentenced to life in prison without parole. He died of cancer while incarcerated at MCFP Springfield.

In Popular Culture

Spangler's story has been featured in various true crime media, highlighting the complexities and tragedies of his life:

  • Crime Stories, Season 8, Episode 6, "A Way with Murder" (December 9, 2010)
  • My Favorite Murder, Episode 235, "Mr. Zip" (August 13, 2020)
  • Devil Among Us, Season 1, Episode 3, "Trail of Blood" (July 30, 2020)
  • Monstruo, Season 2, Episode 8, "The Husband" (December 11, 2019)
  • In Plain Sight, Season 2, Episode 7, "Terrified to Death" (May 31, 2019)
  • The Widower, Season 2, Episode 13, "Park Predators Podcast" (August 17, 2021)
  • Spangler, Episode 1, "FBI Profilers: Criminal Archives Podcast" (July 7, 2024)

Sources

  • "Dying Man Admits He Killed Four in Family". Los Angeles Times. 2000-10-22. Retrieved 2022-01-05.
  • "Robert Spangler – Colorado Serial Killer and Child Murderer by Mask of Sanity". Indie Drop-In Network - Great Podcasts for Listeners and Exposure for Creators. March 9, 2021. Retrieved 2022-03-15.
  • "Colorado News and Denver News: The Denver Post". extras.denverpost.com. Retrieved 2022-03-15.

For a deeper dive into this chilling case, you can explore the original Wikipedia article.

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CASE TIMELINE
Dec 30, 1978

Family Murdered

Robert Spangler murders his wife Nancy and two children, Susan and David, in their home.

Apr 11, 1993

Third Wife Murdered

Spangler pushes his third wife, Donna Sundling, off a cliff in the Grand Canyon.

Oct 2, 1994

Second Wife Found Dead

Sharon Cooper, Spangler's second wife, is found dead from a drug overdose.

Jan 1, 1999

Investigation Reopened

Investigators link cold case homicides involving Spangler and request FBI assistance.

Oct 22, 2000

Spangler Confesses

Robert Spangler confesses to the murders of his first wife and children, and third wife.

Jan 1, 2001

Sentenced to Life

Spangler pleads guilty to first degree murder and is sentenced to life imprisonment.

Aug 5, 2001

Spangler Dies

Robert Spangler dies of cancer while incarcerated.

Jan 1, 2001

Trial Begins

Spangler is tried in federal court for the murder of Donna Sundling.

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