Judging by the name “Hinrichs” I was thinking perhaps he was a neo-nazi but I guess I was olny jumping to conclusions because his brother suceeded in doing a one man jihad.
He retreated each time, and finally went to sit on a bench near some busses. The TATP (Triacetone triperoxide, A.K.A. "Mother of Satan) device blew up, taking Mr Heinrichs with it.
It is far more likely this was a failed terror attempt than a simple suicide.
Bomb Blast at University of Oklahoma (Breaking on Fox) - suicide bomber at OU
OU Bombing Update (Colorado TV Station Says Bomb was REMOTE CONTROLLED)