It keeps being reported that Tommy, Misty or granny was the source of the tip that led LE to do the river search. Maybe just maybe it was Donna or the cousin arrested with them. We haven't heard much of either of them. Donna spent a lot of time with Misty. Considering the way Misty loves to talk, I find it very probable she dropped hints to Donna about the rope, bricks, river. Personally, I don't think LE would spend one dime seaching based on anything Misty or Tommy said w/o them passing a poly based on the story they are trying to sell. I don't think it was any of them that pointed LE to the river. Makes more sense to me it was someone else close to Misty as in the cousin or Donna.