Dexter King is swinging back at his brother MLK III and sister Bernice, who already have sued him, claiming MLK III fleeced his dad's estate. In a new countersuit, Dexter alleges Martin III has been milking their dad's Center for Nonviolent Change. Dex says Martin turned a King Center reception into his "own wedding reception" and tools around in the Center's Lincoln Navigator.

Bernice doesn't get off easy: Dexter says she lit a torch on the eternal flame at their father's tomb -- to carry in a march against same-sex marriage. And Dex also says Bernice using the King Center's office space for her own organization -- and isn't paying any rent.