Blast from the Past. Haven't seen this one since the mid-90s. I'm somewhat amazed that Alfred Sole didn't really do much after this, which IMDB points out is his sophomore effort. My memory's a bit hazy, but in retrospect, the film really reminds me of a low-key Argento-style giallo... made by an American. That might be because of the mood or maybe just the blatant anti-Catholicism, I'm not quite sure. Not a masterpiece by any means, but it's definitely deeper than your average slasher flick.