One little piece of RUMINT (rumor) is that the Good Congressman from Louisian was merely the funnel for all that, if you'll pardon the expression, cold cash, some $90,000 of which was found in his freezer. The actual (intended) recipients may be getting a bit on the nervous side.
Hmm 45 days sequestration... that gets us to mid July, when Congressional campaigns will be in full roar, or maybe full fizzle this year. :)
I think you are on to something here. It is highly unlikely if it was ALL for him he would keep it around frozen. He would have laundered it to some overseas account.
He needed to have it handy to dole out as needed.