Kelly J. McCann runs The Crucible, a Virginia training center for Kroll (
www.krollworldwide.com ) although Kelly & Crew started The Crucible independantly originally it is now part of the Kroll companies.
McCann is the Senior Vice President of Kroll’s Security Services Group and heads it’s Protective Services & Training Group.
He is also an analyst for CNN.
Kelly McCann has done most of his publishing/video production under the name Jim Grover - I believe this started when he was working some sort of undercover something, but was writing articles for Guns & Ammo, so he took on the pen name.
I believe most of his material is published under the name Jim Grover, actually - so whens earching the book-sites, you might want to use that name.
I think Paladin Press is the publisher of all his books and videos -
www.paladin-press.com
As well as the main crucible site, several websites have talked about training with him,
http://www.realfighting.com/issue6/mccann.html
Here is his Kroll bio page-
http://www.krollworldwide.com/services/security/jkmccann/
Here's a reprint of an article from a recent Esquire as well, about his work in Iraq -
http://www.selfdefenseforums.com/forums/showthread.php?s=&threadid=6255
Googling him should turn up more too.
And no, he's nothing like Hock.