48 Hours The Fitbit Alibi
Mar 11, 2026
George Birch, a man whose DNA and phone data tied him to the crime scene. Doug Dietrich, Nicole Vander Heiden's boyfriend whose Fitbit created a pivotal alibi. They discuss the disappearance, the forensic trail from DNA to GPS, the surprising role of wearable tech, courtroom drama, and how investigators pieced together digital and physical evidence to reach a verdict.
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Fitbit Confirmed Dietrich's Overnight Alibi
- Doug Dietrich reported falling asleep around 3:00 a.m. and checked on his baby once before staying asleep until after 6:00 a.m..
- His Fitbit data later corroborated that he had minimal movement overnight, forming the alibi that led to his release after initial arrest.
Partial DNA Clues Led To A Full Match
- Multiple DNA samples from Nicole's clothing and the neighbor's yard produced a consistent partial male profile across dozens of items but initially lacked a full match.
- A later complete profile from a sock produced a national database hit identifying George Stephen Birch from Virginia.
Google Location Data Mapped Birch's Movements
- Google Dashboard location history on George Birch's Android phone placed him at the bar, at Nicole's house, at the field where her body was found, and at the off-ramp where her clothes were discarded that night.
- That continuous location trail provided the key timeline investigators needed to arrest Birch four months after the murder.