RedBull,
I don't think the shorts knew where to look for the fraud. I think the shorts got it from a "good source" that Deloittes was going to walk. But, they didn't know why?
They tried throwing the kitchen sink at CCME and it was embarassingly bad. Weren't they the ones filming the wrong buses or make hokey taped phone calls, or falsifying documents?
Simply they had "insider" information but they didn't know the full reason for Deloittes walking but they needed a story, however bad it was, to short and make their money. They needed to put something in print. Giving them credit is misdirected. Look at the evidence they forwarded.
JMHO