Who Is James Whistler?

OK, we on to Season 3 of Prison Break in Sona now. Whistler, James Whistler who is this guy really ? No one who's been watching still believes some innocent fisherman, even his previously naieve girlfriend Sophia doesn't anymore. In Sona this new inmate came up to Whistler and said " I recognise you from Paris with The Ambassador". Whistler tried to deny it but he wasn't convincing. Mahone and Michael were standing there and they sure didn't