05/01/20112011Omaha, Nebraska, United StatesNebraska22At Millard South High School, student Robert Butler Jr., 18, shot and killed Assistant Principal Dr. Vicki Kaspar, and wounded Principal Curtis Case. Butler then opened fire indiscriminately in the front office area, causing the school nurse to be injured by gunshot debris. Butler drove to a parking lot and then fatally shot himself.Welch, Chris (January 6, 2011). "Slain assistant principal sent student home because of trespass charge". CNN. Retrieved May 14, 2012. |Stoddard, Martha (February 16, 2011). "K2, guardianship bills OK'd". Omaha World-Herald. Retrieved February 17, 2011.