Simple question:
When presented with evidence that someone impersonated *them* and diverted *their funds*, the Claridge - instead of spareheading the subsequent investigation - sent HG on his way?
Have a great day. 
Why would they? They don't care what story you have, you need to pay up.
@Dan I can help with some wiring verification tips, although it all comes down to the basics which should be well known anyways. But, can always be reinforced. Can also provide anecdotes and things to look out for.