Isn't that the nature of an experiment, though? I mean really, when you do the experiment, you don't have proof to back up your claims. You have a hypothesis.
Now, in his case, there is actually some proof. Apparently, these kinds of stem cell treatments have been shown to be efficacious in animal trials, right? So actually, there is some basis for believing that they will do so in human trials as well.
At the same time, however, he doesn't have data showing that his treatments work. But he is gathering that data and publishing his studies in peer-reviewed journals. So, in fact, he is engaged in the science of medicine.
In a few years, if he's right, he'll be a pioneer in stem cell treatment. If he's wrong, he'll have to face the legal, ethical, and professional consequences of his failed experiment.
But, I'm sure you'll agree, it's a bit hasty to claim that he is "a con man bring shit that doesn't work to the people." As you must acknowledge, there is no proof EITHER WAY as to whether the treatments work in human beings.
Please, do try to restrain yourself from defaming people you don't know.
--AC