I swear I remember reading quotes from ticket-takers or security guards or something. It's been 8 years, though, so maybe not.
But even still, a little common sense tells you that this guy was trying to blow up the stadium. If all he wanted to do was commit suicide, why did he go to the trouble of building a bomb? Why do it 80 feet from a completely full football stadium if you only intend to take out yourself? Why was his bomb similar in makeup (on a smaller scale) to the bombs used by Muslim extremists in other attacks? So many questions, all of which point to "this guy was trying to get into the stadium to blow it up."