It was the police station: the church security alarm had gone off. 2 potheads from the fraternity had jimmied the door downstairs. Their mission? Smokin' doobies in the Lady Julian chapel. Not realizing they had tripped the motion sensors, they proceeded to fire up some purple
The police busted them as they were coming back out.
Quoth the rector, "I chose not to speak to the young men, but I did see them from across the courtyard; they looked like they had definitely had better days..."