Not sure if it's impersonator or the same person, but seems to be PGA with pedoramus. In the game 18521422 (Parian table) he killed players who flagged 2nd and 3rd to give 2nd place to his much weaker pga buddy. He would act as if he acknowledges the flags until the end when he suddenly started attacking flagged players instead of unflagged pedoramus. Clearly they were PGA from the beginning. Check out his reviews, looks like he plays like this constantly.

http://kdice.com/profile/44863019/reviews