My besties boyfriend is lying to her and too us (Her close friends). Help?

He has a friend Roy and they were really close before Roy moved and so we added Roy on facebook and he was like really cute and my friend Rachel was talking to him a lot and Hope(my bestie) was asking Mitch(Her boy) if that was really how Roy looked and he kept saying yes and we kept asking cause we didn't believe him but he kept saying yes so finally believed him because he's never lied to Hope or any of us before (as far as we know) and then a few weeks later(Today) my friend Bailey found out that the guy was actually an Abrocrombie Model named Colin and so Hope called Mitch who is driving to Texas right now and asked him about it and told him about the picture Bailey found and he said 'Well the last time I checked that's what Roy looks like' and Hope told him 'Well the last time I checked Roy's name wasn't Colin' and hung up. So we know he's lying but he still won't fess up. What should Hope/We do?