
In 1970, Mary Petry and Bill Sproat, two university students in love, were murdered in a Columbus, Ohio apartment. The crime was so brutal it drew comparisons to the Manson murders of the previous year. The case has never been solved. Host/Producer Justin Glanville and the sisters of the two victims track down friends, witnesses to the original investigation and the Columbus police to understand w... more
| Publishes | Weekly | Episodes | 8 | Founded | 2 years ago |
|---|---|---|---|---|---|
| Category | True Crime | ||||

The approvals process for submitting DNA evidence proves time-consuming, as Columbus Police ready samples for “familial searches” of offender databases. A woman whose sister was murdered in the 1980s explains how forensic genealogy led to answers and... more
Columbus Police agree to speak with Mary's identical twin sister, Martha Petry, and reveal they are waiting to submit DNA evidence for forensic genealogy analysis. First, they're working to rule out two other suspects. James Renner, a true crime auth... more
A woman who shared a ride to Columbus with Mary recalls Mary was adamant about waiting for Bill to pick her up from a hotel lobby, which Mary's brother finds puzzling. Podcast host Justin Glanville explores a possible connection between the crime and... more
Police and family members have long speculated that whoever killed Mary Petry and Bill Sproat may have known them. There were no signs of forced entry into the apartment, and the brutal nature of the killings indicates an emotional component. But Mar... more
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I love when good journalists do true crime podcasts. Fewer gimmicks, less wasted time by sticking to what’s useful, and a story that’s easy to follow. That’s Mary and Bill. I cannot believe there have been no updates from the prosecutor or police since 2023 when they started the genetic testing. What could possibly explain that? The family isn’t getting any younger. While the podcast does not point fingers at the state dragging its feet, any one with a brain has to ask that. Did they lose the ev... more
don’t want to lose track of this…can you give and update as to the state of this investigation?
A very thoughtful and interesting podcast, thank you Justin. Learnt a lot about DNA testing and the concept of closure. Rest in peace Bill and Mary.
Good show
Very good true crime pod. I realize you are constrained by CPD’s actions & communications, but please keep us updated. Keep applying pressure. Podcast led to case being worked again.
Warning: unsolved, cliffhanger
How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.
Apple Podcasts | #96 |
Listeners, social reach, demographics and more for this podcast.
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Mary & Bill: An Ohio Cold Case launched 2 years ago and published 8 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.
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