The fact i don't understand is on what basis did you even decide to send him the funds first through a messenger without using a escrow seeing the fact he doesn't really have any sort of reputation please use escrow otherwise regret later.
I really dont understand why he should still trust him if he had done his own research because a quick look at his account shows he has been tagged since August only if the fraud took place before then and even at that, a further use of an escrow would have solved all this and I hope the amount involved is not much because there is no way to really recover it from him but evidence for the scamming should be provided as well.