Late paying due to an issue with the bank

Here is the quick and dirty; I am late cashing out an investor due to the fact that my account is currently frozen due to some red flags on how I was moving money in and out (newer account, a few failed closings, so monies came in and out of escrow, so the activity looks weird) 

The bank is doing some kind of anti money laundering investigation, which I am not worried about at all. What I am worried about is an agitated investor that I have who I am late in paying due to this situation.  I am only (currently) 13 days late in paying him.  Am I exposed to any legal liability currently?  I have been in communication with him the entire time, and am by no means blowing him off.  That doesn't seem to satisfy him though.

Should I be worried? I should be able to make payment soon (within about 4 days or so), but I am taking his ire seriously.  Please advise.