AUSTIN, Texas (AP) — It was the nightmare scenario that had been at the heart of the debate over Texas' new law allowing concealed handguns on college campuses: a knife-wielding attacker stabbing and slashing his way through a crowd of panicked students.

But no gun-toting student or professor pulled a pistol to stop the man in his tracks. No shots were fired and no gun was even drawn until police swarmed in to subdue the suspect at the University of Texas, where one student was killed and three more wounded by a 21-year-old classmate with a knife and a reported history of mental health problem...