Read the court documents. If Ken is a liar then Buddy and Lonnie must be lying too, because they back up his story.
So now we have 3 people saying that Gaddy wants Mae dead, and Gaddy has been strangely silent. Who do you expect us to believe?
IANAL--IDEPOOTV--but I find it curious that the document which cites the things that Oda Mae told her relatives doesn't explicitly who stated who was claiming what. I would expect that the statement "Kenny, Beth is trying..." was attested to by Kenny, and likewise "Lonnie, I am scared..." and "Budy, I have discovered..." would have been attested to by Lonnie and Buddy. But the document doesn't actually say that.
Still, it would seem that either three people are trying to smear Beth for no apparent reason or else Beth is up to something bad.