Killeen is a city situated in Bell County in Texas. The town’s population was 127,921 as of the 2010 census. There was a fort located in the area of the city in 1862. In 1881. The Gulf, Colorado and Santa Fe Railway expanded. Around the railway, a 70-block town was fortified. The town was named after Frank P. Killeen. He was the assistant general manager of the railroad. Around the 1940s, Killeen endured a small town and a trade center. From 1949. To 1950. The population rose from 1300 to 7,045. And just 5 years later the population increased to 21,076. 16th of October, 1991. Was the date of the Luby massacre. A person by the name of George Hennard drove a pickup truck through the restaurant. He shot and killed 23 people, and injured 27 people, right before killing himself. This is the seventh most lethal shooting in U.S History.