SOLVED. Plans to commit 52 deck of cards murders. Spoiler ahead. [s]

[Matt]

Book around 1990/80s? A local sheriff leaves playing cards at the scenes of gruesome killings. The killing become increasingly more elaborate as a priest is crucified and as he plans to use a missile launcher, etc.

Thank you!

[Rosa]

The Ultimate Game?

[Matt]

THAT's IT!

Case closed. THANK YOU!

[Rosa]

Fantastic! Only, I think the fact that it's the sheriff is a huge twist. I think you should mark it as a spoiler.
I'm glad I could help.

[SamSpayedPI]

If it's a spoiler, the heading should be modified to exclude the reference to the sheriff.

[Kris]

Glad you found your book, Matt. I added a spoiler alert to the header.