I agree. It makes for compelling tv but there isn't any real evidence tying her to murder. I could believe that she tampered with his will though.
While her current views on tiger breeding and cub exploitation and support of legislation to protect these animals are laudable, she's isn't altruistic. Her advocacy is about herself as much as the cats. I think she enjoys being in the public eye, like Joe. She said at one point that a possible positive outcome of her murder would be bringing attention to animal rights abuses. That says a lot about how her self-worth is tied up in her advocacy. Basically, it seemed that she sees herself as a matyr.
I thought the same thing based on what was shown, so I went to her sanctuary's live cams. The animals were in much larger, more natural looking enclosures than at Joe's zoo. Of course I can't say for certain that all the cats are being housed in optimal conditions based on this, but it was better than what we saw on Tiger King.
I don't know if Joe's threats against Carol had developed to conspiracy or not, but I'm not sorry he got 22 years. He most definitely was guilty of animal abuse. When he was talking about his maltreatment of the chimps and said he got caught up in running the zoo, I rolled my eyes. He got caught up in being the Tiger King: self-aggrandizement, fame & money. He should have gotten charged for the way he treated his staff too.
I hope Doc, Jeff, Stark & Mario get taken down & protective legislation gets passed soon. It was disheartening to learn that there are more tigers held captive in the US than living free in the wild.