In December, 1991, four normal, suburban teenage girls were executed in a yogurt shop in Austin, Texas. The four girls -- 17-year-old Jennifer Suraci, her 15-year-old sister Sarah, 13-year-old Amy Ayers, who was Sarah's best friend, and 17-year-old Eliza Thomas, who was also working that night - were totally innocent victims, and the small, relatively crime-free city of Austin was shocked by the murders. And in another Monday Night Mystery: what would you do for your best friend? If he begged you to shoot him so that his family could collect a life insurance policy, would you do it?