Might want to look around and see who's conspicuously left standing once the martyr roams free - they ought to have a hint for you :)
Alt. wait for it to show up on GameFaqs in 3 years, for authentic 90s vibes.
Well, I've now humped every wall in Plaza96 about 26 times! I have so far found a factory with no collision and that's about it. I feel bad that the Martyr has to watch this