She is probably free because of the lazy sheriff department in the first place. Remember the meter man reported three times about some trash bags that looked suspicious in a woods that was only a couple of blocks from Casey's home in which she used to play in as a child. Three time he tried to get them to investigate and they just told him it was trash so after several months he decided to check himself and found her remains it was only 19 ft into the woods yet the sheriff didn't have anyone that would get out of their car and walk basically one car length into the woods. How much evidence was lost in all those months because of their lazy ass cops. People came from all over the country to search for that little girl and the reason they didn't check that woods was because the sheriff told them it was already checked out.