Dave McKay
I had never heard of this "Dave McKay" guy. Apparently, he was briefly a member of the COG back in the 1970s but left to form his own cult, "
Jesus Christians". These
freaks believe in "donating" kidney's (which, I never knew, is actually illegal in many countries). I put "donating" in quotes because some former members claim that they were coerced into doing so. They also believe in whipping each other (until it leaves marks) for forgiveness of sins. Fortunately, there are only around 30 members worldwide.
Anyway, you can view Dave McKay and some of his followers on the
Jeremy Kyle Show (a British show), along with Kristina Jones (of
Not Without My Sister) and other former members of other cults here (note that the link below is Part 1 of 12; all are on YouTube):
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http://www.youtube.com/watch?v=EfGXjY2XNhI