Re Letterman blackmailer any chance his claim that the ransom demand was "a screenplay" will work?

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Any chance this ploy will work?

No.

My understanding is that this is how blackmail schemes commonly work in celebrity cases.

“I’ll sell you the rights to this sordid, embarassing story about you for $500k. If you’re not interested, I’ll shop it around to see who is…”

The answer turned out to be no. Halderman plead guilty this week to a grand larcency charge, admitting he tried to extort $2 million from Letterman. His lawyer is quoted as putting a positive spin on the “novel legal issues” they raised.