Ann Rule: True crime-author on why the Russel Douglas murder case was so intriguing

The bestselling author wrote a book about the Douglas case called "Practice to Deceive"

Ann Rule, the author of over two dozen New York Times bestsellers, tells "48 Hours" she couldn't help but write about the Russel Douglas case.

"Russel was a young fellow in his 30s quite bright -- just about to get his Master's degree. ... And he really seemed like the last person to be murdered. And it became -- such a mystery," Rule said. " And in -- in the end they found, what I would think, were unlikely suspects."

Watch the video above to hear more from Rule, who wrote the book "Practice to Deceive" about the case.

"Practice to Deceive" is published by Simon and Schuster Inc., which is owned by CBS Corporation, the parent company of CBS News and

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