QUOTE
Wesley Street
Actually, you don't have to look any further than Shadowrun v.1 for a decent detective/thriller module: Elven Fire. I ran it with my group a few months back and they enjoyed it.
Thanks Wesley, I will take a look at it.
QUOTE
coolgrafix
Ok, don't laugh, but I think the original Ravenloft would be a fucking hoot to convert and use. Not so much the detective work, though.
I was thinking about these, but I was unsure how they would be in the suspense/thriller/horror setting. Nice call; do you have any specific modules you would recommend?
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deek
What about that Harlequin set of adventure from 1st edition? I was reading through that a few months ago and thought it would translate quite well to SR4. There's some mystery and the potential for detective work there.
I actually have that adventure, and I do plan to run them through it.
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Adarael
I've said it before and I'll say it again: Double Exposure. Very quiet, deep cover operation.
I will have to look that one up, what RPG System does it use? I know if I try looking up “Double Exposure� I will receive to many links to shift through.
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coolgrafix
The 1st Ed SR module that meets all your criteria is Universal Brotherhood. That and Harlequin are available as PDFs here.
I have both of them in PDF format.

Anyone else have any suggestions, and the adventure/module does not have to contain every element I have listed.