Thomas Mather (Seven of Diamonds from Iowa)

2026-01-21

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Our card this week is Thomas Mather, the Seven of Diamonds from Iowa. Nothing causes the true crime community to stir more than a case with the open-ended question of did he? Or didn’t he? Well, except that is, when the question is did SHE?For longer than 32-year-old Thomas Mather was alive, a rural town in Iowa has been haunted by their only unsolved homicide. The former Sheriff told us it’s the only who dun it they have left.Does no foreign DNA evidence and strange behavior mean that Dawn Mather had to have been invo...

Our card this week is Thomas Mather, the Seven of Diamonds from Iowa.

Nothing causes the true crime community to stir more than a case with the open-ended question of did he? Or didn’t he? Well, except that is, when the question is did SHE?

For longer than 32-year-old Thomas Mather was alive, a rural town in Iowa has been haunted by their only unsolved homicide. The former Sheriff told us it’s the only who dun it they have left.

Does no foreign DNA evidence and strange behavior mean that Dawn Mather had to have been involved in killing her husband? Or does an unidentified fingerprint and tire tracks prove she didn’t?

If you know anything about the murder of Thomas Mather, investigators want to hear from you. Please contact the Iowa Attorney General’s Cold Case Unit at 800-242-5100, or to remain anonymous, you can call Crime Stoppers at 563-886-6618.

View source material and photos for this episode at: thedeckpodcast.com/thomas-mather

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