If you're talking about Di Miao, oh, he knows exactly what he's talking about. And if he had been hired by the prosecutors, he likely would have testified Zimmergun's injuries were insignificant and resulted from a minor and brief tussle.
Perhaps it's just a coincidence, but seems curious that his medical opinions always seem to fall in line with whatever the party paying him wants to hear. No matter how far-fetched that makes those opinions. As, for example, when he did his best to help wacko gun-nut Phil Spector beat his murder rap.
From a skeptics point of view, appeals to authority are even more ill-advised when the "authority" has a dog in the race, and even has a financial incentive to help that dog win.
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