Sounds like a weak case to me. One of the articles states "Lefever is accused of deceiving two horse owners at Penn National racecourse in Grantsville, Pa., by indicating to them she would make every effort to retrain and re-home their retired Thoroughbred racehorses."
If that is what the owners were told, then a good home was not guaranteed, simply that she would make every effort to find one. To convict her on those charges they have to prove that she had knowingly and deliberately gone against their agreement - since there was not a written contract and the verbal agreement is vague, they'll have trouble. I'm not putting any weight in the nasty remarks they are claiming she made unless they're in text or recorded - they seem to serve no better purpose than to instigate an emotional response from the reader. Not defending her or saying she didn't take those horses with the intent on selling them to a kill buyer, but besides some very upset owners, there doesn't seem to be anything distinguishing that from the possibility of her taking the horses on with good intentions, getting in over her head and offloading them as quickly as possible. Poor decision making sure, but good luck charging her for it with little to no hard evidence. This is why we always get things in writing people. Always.
So what's this about kill buyers being so desperate for horses that they are approaching rescues? I'm honestly curious as it isn't the first time I've heard that statement but can't for the life of me see any reasoning behind it, since desperation from canadian kill buyers to find new sources would indicate a slump in supply - which is very much not the case.