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The Deck

Ronda Taylor and Bonnie Ryther (the King of Clubs and 9 of Diamonds, Florida)

The Deck

Audiochuck

True Crime

4.610.7K Ratings

🗓️ 11 February 2026

⏱️ 23 minutes

🧾️ Download transcript

Summary

There is a man serving a life sentence in a Florida prison for his part in the 1989 murder of a 29-year-old pregnant woman named Donna Callahan. Two brothers were ultimately convicted for her abduction – and each of them pointed to the other as the ultimate preparator. But only one of them would go on to confess to over a dozen other murders. That man is now considered, by some, to be one of the deadliest killers on Florida’s Gulf Coast.  And if his original confessions are to be believed, then not one, but two Fort Walton Beach cases could be closed. Right now, one detective is making it his mission to find out once and for all: Can he prove Mark Riebe is the serial killer everyone thinks he is? And was he–or someone else entirely–responsible for the murders of Ronda Taylor and Bonnie Ryther?

Transcript

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0:00.0

Our cards this week are Rhonda Taylor, the King of Clubs from Florida, and Bonnie Rither,

0:09.6

the Nine of Diamonds from Florida.

0:12.2

There is a man serving life in a Florida prison for his part in the 1989 murder of a 29-year-old

0:19.0

pregnant woman named Donna Callahan.

0:21.6

Two brothers were ultimately convicted for her abduction, and each of them pointed to

0:26.6

the other as the ultimate perpetrator in her death, but only one of them would go on to confess

0:32.6

to over a dozen other murders. And that man, Mark Reby, is now considered by some to be one of the deadliest

0:40.3

serial killers on Florida's Gulf Coast. And if his original confession is to be believed, then

0:46.5

not one, but two Fort Walton Beach cases could be closed. So one detective is making it his

0:53.4

mission to find out once and for all.

0:56.0

Can he prove Mark Reby is the serial killer everyone thinks he is?

1:02.2

I'm Ashley Flowers, and this is the deck.

1:09.9

Music The

1:13.6

The In 1998, an agent from the Florida Department of Law Enforcement went to visit an inmate at the Union

1:44.4

Correctional Institution in Rayford, Florida.

1:47.7

That man's name was Mark Reby.

1:50.0

And at that point, he'd been in prison for more than five months for murdering a pregnant

1:54.3

woman named Donna Callahan.

1:56.2

But the FDLE wasn't up there to talk to him about that.

1:59.7

Mark had sent a letter to the FDLE agent requesting a meeting to talk about the 12 other murders he said he'd committed.

2:08.5

What followed was a chilling recitation as Mark rattled off descriptions of 13 victims along with how they were killed.

2:16.6

Some vague, other specific, like a woman in her condo

...

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