I think the best thing we can do is file a police report, notify the local DEA ( because they are impersonating them) & then... actually play along - thats right, play along, waste as much of their time as you can - because they are playing a numbers game & the way that they win is - as soon as they figure out that we are too smart to fall for their scam, they move on to the next victim, who may not be so smart.  So play along, delay them, get a voice recorder if you can (put your cell phone on speaker & record it, they can do a voice id on the guy- this is what the local DEA officer advised me to do.)But delay them, pretend to be a little afraid, but then pretend to be trying to contact family members to get the money from, then pretend to be going to your bank, their bank, etc. etc. string them along, pretending to be trying to cooperate. waste their time