I've also posted the detonation could have come from a second source. "They" were watching him try unsuccessfully to enter the stadium. There was another bomb planted near the stadium that LE later found. The bus driver said he was bent over doing something with his backpack. What if the "they" thought since he couldn't get into the stadium he was giving up and was taking apart the bomb so hit their button.
I just got through speaking via email with Mark Tapscott. He has requested I post a link to his most recent blog entry here at FreeRepublic. It is an Open Letter to OU President Boren...
DEAR PRESIDENT BOREN: What Did You Know About Joel Henry Hinrichs and When Did You Know It?
http://tapscottscopydesk.blogspot.com/2005/10/dear-president-boren-what-did-you-know.html
A hearty Freeper THANK YOU! to Mark for keeping the pressure on for the facts to be reported!