You don’t keep public records of bribes.
That would defeat the purpose of bribes LOL!
But . . . but . . . if a law firm doesn't keep complete and detailed records of all criminal transactions it facilitates, then John Grisham's The Firm would have seemed ridiculous to you when it was published, as it did to me.
However, $6.6 BILLION? Nobody (nobodynobodynobody) loses $6.6 billion. Many cold-case-type forensic-accounting and other type somebodies should be looking at this seriously, and those who are able-bodied and receiving unearned government benefits should be erecting scaffolds in every public park.