I would say he deserved about 20-25 years. He engaged in a large-scale drug operation. He explicitly set out to start a drug operation. He operated a drug operation that was larger than most could even imagine. And the fact he tried to put hits out on people really seals the deal, while it doesn't matter legally it does matter when we think about how much time did he really deserve.
Do you believe in the presumption of innocence or not? This isn't an ambiguous thing.
Furthermore, they had the evidence, they just dropped the charges because he had multiple life sentences.