In the quiet community of Trevose, Pennsylvania, nestled just outside Philadelphia, the peace of Fleetwood Drive was shattered on March 12, 1976. What unfolded that day would become one of the most chilling true crime stories in the state’s history—a meticulously planned and cold-blooded act of mass murder rooted in festering resentment, isolation, and madness.
LowerBucksSource.net article about Michael Abt
Find a Grave:
- John Abt, Sr.
- Margaret (“Peggy”) Abt
- Clifford Abt
- Margaret (“Margie”) Abt
- John Abt., Jr.
- Kathleen Abt
It’s free to “leave a flower” at Find a Grave.
It began innocently enough. That Friday evening, 20-year-old Michael Abt returned home expecting the familiar warmth of family life. Instead, he found broken glass, bloodstains, and an eerie silence where laughter should have been. As he called out in vain for his parents and siblings, even their normally eager St. Bernard, Heidi, failed to respond. Alarmed, Michael ran to a neighbor’s house and flagged down a passing police officer, setting in motion the investigation of a horrific true crime case that would rock the small town.
When Officer David Clee shined his flashlight down into the basement, his stunned reaction—“My God”—signaled the discovery of a massacre. The Abt home had become a slaughterhouse.
The Abt family were beloved members of their community. John Abt was a respected Bell Telephone employee and scout leader. His wife Peggy worked for the IRS. They had five children, ranging in age from 12 to 23, and had welcomed into their home Margie’s fiancé, Gary Engle. The family was well-liked, active, and seemingly without enemies.
But across the street lived George Geschwendt, a socially awkward, emotionally scarred young man with a deeply troubled past. Once a childhood friend of the Abt boys, Michael and Clifford, George’s life had spiraled into isolation, unemployment, and mental instability. Over the years, he became convinced that the Abts were targeting him with pranks—silent calls, surprise deliveries, a string of petty annoyances. Whether these incidents ever happened or were figments of his paranoia, no one could say for certain. But George believed it all. And it festered.
On the morning of March 12, George Geschwendt, now 24, broke into the Abt home. Wearing rubber gloves and carrying a .22 caliber pistol—one he had previously reported stolen to mislead police—he waited in silence for hours. When the family returned home, one by one, he executed them with chilling precision. The children, their parents, even the family dog—no one was spared. Each victim was shot in the face and discarded into the basement, where a ghastly pile of bodies grew.
Margie Abt returned home unaware of the fate that had already befallen her loved ones. Minutes later, she too was gunned down. Her fiancé, Gary Engle, arrived shortly thereafter. He also never made it out alive.
This true crime documentary reveals a deeply disturbing glimpse into a fractured mind consumed by vengeance and delusion. What began as a neighborhood friendship between boys spiraled into a deadly obsession. Geschwendt’s plan was to eliminate the entire Abt family, including Michael and Clifford. And he came terrifyingly close.
The community was left in mourning, a peaceful street now forever linked to one of Pennsylvania’s most brutal massacres… and the killer, hiding in plain sight, was someone no one ever suspected.
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