And as for Nat's riddle 1:
Riddle 2 may need coming back to, but here's a stab in the dark:
I agree with 1, but I don't know if 2 would be that obvious. It's definitely plausible, though. How many locks have we gotten through?
^ I don't really think it's that surprising she knew her name. The murder would have been on the news, and it would have mentioned her name.
*continues to read five hundred pages of Mafia*