Who murdered Frank Fish?

[SgtZombie]

Found this and about a once famous treasure hunter murdered in the 60s and trying to bring more attention to it.
The Curious Death of Frank Fish — Ghoulifornia

 

[Richard]

Frank L. Fish wrote this book:

Buried Treasure and Lost Mines FRANK L FISH 1963 Second Printing - Excellent! | eBay

 

[Richard]

The story about Frank L. Fish mentions a friend of his named Harry Riesberg, who was also an author and treasure hunter:

Harry Rieseberg

 

[SgtZombie]

I metal detect as a hobby not as much as I would like to but probably why this story really interests me and I know there's a book I think by Ben Traywick but I've never got to read it.
It's important to remember lots of treasure hunters that wrote for magazines has lots of different pen names back then because they didn't want a bunch of stories from the same nane. Which is ironic because that what they got any way. I be interested in hearing what happened to his friend!