Well, aside from the vast majority of reports being for you and Darth Katie anyway; there should have been more randomness than that.

The "emphasis placed on picking the 'usual suspects'" was really just a suggestion from you. It wasn't something that everyone agreed to like in the crossover game when we all decided that we were choosing between two people to hypocop. Even if people had agreed to it, it wouldn't necessarily have worked, as it wasn't planned ahead of time and so the real cop could have investigated someone else.

Roles are assigned randomly, are they not? So there is no greater chance for one of the more established veterans to be a member of the mafia than anyone else. In fact, if I had been the cop, I would have purposefully avoided investigating one of the "usual suspects" as experience has shown that those people are more likely to be targeted for a nightkill first. Indeed, you have said that you think that is exactly what happened last night. If the cop investigates someone and that person is killed on the same night, it was a wasted investigation.