<p>In 2016, Nicole Vander Heyden went out with her boyfriend Doug Detrie and friends but never made it home. A day later, she was found beaten and strangled in a field. Wisconsin police used a host of digital tools to try to solve her murder. One device created an alibi. But other tools were used to incriminate her killer. “48 Hours" Correspondent Erin Moriarty reports. </p>
<p>This classic "48 Hours" episode last aired on 7/19/2025. Watch all-new episodes of “48 Hours” on Saturdays and stream on demand on Paramount+. </p>

In 2016, Nicole Vander Heyden went out with her boyfriend Doug Detrie and friends but never made it home. A day later, she was found beaten and strangled in a field. Wisconsin police used a host of digital tools to try to solve her murder. One device created an alibi. But other tools were used to incriminate her killer. “48 Hours" Correspondent Erin Moriarty reports. This classic "48 Hours" episode last aired on 7/19/2025. Watch all-new episodes of “48 Hours” on Saturdays and stream on demand on Paramount+.

The Fitbit Alibi

“48 Hours” uncovers the narrative behind crime and justice cases that have left a lasting mark on society. Award-winning CBS News correspondents thoughtfully examine the complexities of each crime by transporting you to the heart of the investigation through key evidence and gripping interviews with critical figures from the case. The unmatched reporting has made a tangible difference in countless lives, leading to the exoneration of wrongly convicted individuals and the reopening — and resolution — of previously closed cold cases.Listen to a new “48 Hours” episode every Monday&nbsp;and&nbsp;then go deeper into the case on Tuesdays with the immersive “Post Mortem” series — producers and correspondents join host Anne-Marie Green to discuss key evidence, dead ends, mishaps, and stranger-than-fiction twists they faced in the field. Also available on the 48 Hours YouTube channel. Plus, every Wednesday and Thursday, we’ll revisit a classic “48 Hours” episode.&nbsp;Get ad-free access to 48 Hours podcasts by subscribing to 48 Hours+. Subscribe at 48HoursPodcasts.com, then listen in Apple Podcasts, Spotify, or use your private link in your favorite podcast app.

TV & Film

True Crime

“48 Hours” uncovers the narrative behind crime and justice cases that have left a lasting mark on society. Award-winning CBS News correspondents thoughtfully examine the complexities of each crime by transporting you to the heart of the investigation through key evidence and gripping interviews with critical figures from the case. The unmatched reporting has made a tangible difference in countless lives, leading to the exoneration of wrongly convicted individuals and the reopening — and resolution — of previously closed cold cases.Listen to a new “48 Hours” episode every Monday and then go deeper into the case on Tuesdays with the immersive “Post Mortem” series — producers and correspondents join host Anne-Marie Green to discuss key evidence, dead ends, mishaps, and stranger-than-fiction twists they faced in the field. Also available on the 48 Hours YouTube channel. Plus, every Wednesday and Thursday, we’ll revisit a classic “48 Hours” episode. Get ad-free access to 48 Hours podcasts by subscribing to 48 Hours+. Subscribe at 48HoursPodcasts.com, then listen in Apple Podcasts, Spotify, or use your private link in your favorite podcast app.

Share The Fitbit Alibi

Sign up to save your podcasts

The Fitbit Alibi

The Fitbit Alibi

More shows like 48 Hours

20/20

Snapped: Women Who Murder

Cold Case Files

Dateline NBC

My Life of Crime with Erin Moriarty

The Binge Cases: U R NEXT

Nightmare Next Door

Betrayal Weekly

Dateline: Missing In America

Inside the Lori Vallow Daybell Trial from 48 Hours

Dateline Originals

Blood is Thicker: The Farris Wheel

Dateline: True Crime Weekly

Murder in the Orange Grove: The Troubled Case Against Crosley Green

Candyman: The True Story Behind The Bathroom Mirror Murder

48 Hours: NCIS

Deadly Mirage

Murder in the Moonlight

What Happened to Holly Bobo?

Inside the Bryan Kohberger Case: The Idaho Student Murders

Fifteen: Inside the Daniel Marsh Murders

Deadly Engagement