A shooting on a Saint Louis school bus in the winter of 1996 left a 15-year-old pregnant student, Kyunia Taylor, dead and her premature daughter, Diamond Taylor, born by emergency C-section on February 29, 1996. The infant weighed about three pounds at birth and died on March 23, 1996, of brain damage attributed to oxygen deprivation suffered during the traumatic delivery.

Authorities say the shooter was a 30-year-old teacher, Mark Boyd, who allegedly opened fire on the bus, wounding the driver and fatally shooting Kyunia six times. Two other men, Michael Durley and Randy Wilkes, gave videotaped confessions at one point and later recanted; investigators ultimately built their case against Boyd. He was convicted on two counts of second-degree murder and two counts of armed criminal action for the deaths of Kyunia and Diamond Taylor.