Sounds like two teenagers had sex and later got married. Doesn't seem astoundingly corrupt to me.
I knew of a ministerial servant who stole around £500 from congregation funds and got a private reroof. I was surprised they didn't have better systems in place to catch that but maybe it happens all the time,
Seems pretty small scale compared to what happened at the publishers of The Christadelphian magazine, Apparently the editor of the magazine stole funds amounting to hundreds of thousands of pounds over many years, before he was caught. It's somewhat impressive actually that such a tiny denomination had enough funds to absorb that scale of theft unnoticed for years. It's quite an interesting story you can read about here:
http://www.christadelphianresearch.com/investigationforfraud.htm
I have no independent verification of the details given on that paragraph, other than simply that it seems to be documented and not particularly sensational. I find Christadelphians fascinating in lots of ways, both insider and outsider perspectives.