Mesa, Arizona

18-year-old Bob Smith took seven people hostage at Rose-Mar College of Beauty and ordered them to lie down in a circle. He shot each in the head. Four women and a 3-year-old girl died; another woman and a baby were injured but survived. Police arrested Smith, who reportedly admired Richard Speck and Charles Whitman. Smith was sentenced to death in Arizona’s gas chamber, but his sentence was commuted to life when the U.S. Supreme Court ruled the death penalty unconstitutional in 1972.