Another - "What's the name of that movie?" thread

[fotno]

As the thread title explains, I'm trying to figure out the name of some long lost movie I saw 30 + years ago. Most of the time (given modern access to the internet and sites like IMDB) I can figure this sort of thing out on my own, but this one has eluded me for years... It's a movie that scared the crap out of me then, so I always seem to come back to it around Halloween.

Details:

A lead character (or characters) being pursued by some sort of cult. Could be Satanic, could be winos for all I can remember. I seem to recall the male lead looking a bit like Tom Skerritt (dark hair, mustache) but I doubt it actually was Skerritt. The cult members come from all walks of life, and are unexceptional but for one trait: A tattoo of a snake or dragon in the palm or on the back of their hands.

There's much angst, and running and driving madly about, until finally the baddies are defeated and the heroes get away... But wait! At the very end.. That friendly cop (some dude in a uniform anyway) is waving, oh no, is that a tattoo? *Freeze frame on tattoo while scary violin music plays*

That's all I remember... Help me Obi Wan!