The whole killing his sons dealer is not true
Except none of its true. Until you actually read the details of the case and realize that his "selling drugs to his son" story is what he told people to make them feel sorry for him. Hall and another guy were hired to kill the victim to keep him from testifying against a third party. Quite a bit different from the story they use in the documentary to make you feel sorry for him. Hall seemed like an ok guy at the end of his life but everything you find out about how he lived (murder for hire, 8 wives, leaving his son at the age of 1, lifelong segregationist ) makes you realize there are a lot of people out there that are much more worthy of our sympathy.
Simply being a war veteran doesn't give you a pass to live a *beep* life and ruin other people's lives.
Below is the link to the appeal case that describes what actually happened.
http://www.leagle.com/decision/19871100411NW2d689_11095.xml/STATE%20v.%20FLORIE