Is this the real sniper's perch? A phony? And who owns it? And will we ever find out?Earlier this afternoon, I spoke with Joel Elliott, the Canton-based attorney for Caruth Byrd, who, for the last two years, has been embroiled in a contentious legal battle with Aubrey Mayhew over which man owns the actual sniper's perch lifted long ago from the Texas School Book Depository. Alas, as we noted yesterday, Mayhew died over the weekend -- and left behind no will. Which means a messy fight over the wi