What a beautiful horse, so sorry you lost him. I cannot believe how terrible he looked when you first got him back and that no one would do anything about it. That is a very clear case of neglect. I would take those pictures to the agencies who refused to help and apparently did not even go LOOK at this horse and demand an explanation. Criminal charges are often filed in cases like this. I have never heard of a mud puddle and some weeds being considered "sufficent". Poor boy, at least you were able to make his last years much better.