À few things I`d like to add. Could the other end of a stun gun have been used in the head blow?
I`ve been thinking about the hacking idea a little further. If IDI, I actually see this plausible. The hackers need not be in computer business themselves, they could be just some college kids who were perhaps familiar with the Ramseys and JB, perhaps John Andrews acquaintances. But the SBTC might refer to Small Business something. Here`s an SBTC (Small Business Technology Council):
http://www.sbtc.org/about/wwd.html
And here`s a SBIR (Small Business Innovation Research)
http://www.sbir.gov/
"We respect your bus(s)iness, but not the country that it serves"
"Small foreign faction"
"If we monitor..you will be scanned.."
"S.B.T.C - Victory"
118,000 dollars, they were able to hack AG`computer system or phone system and find out about Johns`bonus amount. They had a grudge against AG or John himself. And they were perhaps against capitalism and big companies, but not small businessess.
They may have come up with the idea of kidnapping after they had hacked the information and though about what they could do with it.