They have just as much interest as us in finding the lost funds. Which means they will put capable people on the task of figuring out exactly what happened to out funds. There will probably be a criminal investigation as well.
What makes you think that they really want to find the lost funds? Just because they said so?
Ah, you are playing idiot again. No, saying so makes no difference.
There are several parts to this: 1. Find out how the funds leaked out. 2. Find out to where. 3. Find out who received the funds.
1 and 2 should be possible though a thorough audit. 3 may be possible to the extent of finding accounts which received double payments, reversed bank transfers, etc. Finding the people may be more difficult. At least those people are unlikely to make any claims.