I am very sure that guy was indeed Dr Etienne Grech because i skyped with him before and i remember very well how he looked like on skype
That is usually what a scammer does to convince you he is real: use an old footage of the person he pretends to be during a Skype call. The image will freeze on the screen and the sound quality will be bad. The call will not go on longer than few seconds.
The scammer can have a better solution for a longer screen presence during a Skype call. There is a specific software that can be used for that, based on a picture of that person. The software is accessible and can be downloaded for free in certain forums and it will allow a basic interaction - meaning the person on the screen will move, wave or even blow a kiss. He will not have sound (any excuse will be good for that, like a microphone not working or him pretending to be in a place where his voice can disturb others).
Anything online can be faked if you know how to do it. You were not in contact with the real Dr Etienne Grech.
Help yourself by helping others - report your scammer here.Google can be your best friend
;use it if you have doubts about someone met online. If someone met online only asks for money, no matter what reason, it´s 100% scam.