I’m not well-versed on Burkman’s presentations, but what I’ve seen he resorts to hyping logical possibilities and constructions (e.g., paying some university “profilers” to conclude that Rich was likely killed by a professional hit man instead of a robbery gone bad). I prefer investigations that uncover facts that lead somewhere, but I’ll give him credit for keeping the story on life support when the DC police, the media and Rich’s family wanted it gone. I don’t trust the guy or his motives. If he was trolling with cash for false reports on Mueller, he has done a lot of harm (and possibly he has been paid to do exactly that, to create the appearance that Trump is behind it). If he is merely stooping to the level of the Democrats on his own initiative, I do think much of that either. He’s already been outflanked.
I have researched set Rich for months and hundreds of links. I don’t know very many that think it was a robbery gone bad since nothing was stolen. Not his watch money or wallet.