TMZ is reporting that doctors believe Joe Exotic’s prostate cancer has spread to his bladder. The tabloid obtained a letter and in it Joe says he's had a lot of blood in his urine and during cancer treatments. Joe met with his urologist Wednesday and apparently he thinks Joe's cancer has spread to his bladder. Some testing will be done to make sure, but the “Tiger King” notes in the letter that "I want to stay here and just let it take its course.” He adds “The world has to know just how corrupt our justice system is … If I have to be the one to die innocent in here fighting for the truth maybe people around the world will finally speak up for the truth for once.”