David Lynn Harris was an orthodontist who owned a chain of orthodontist offices along with his wife, Clara Harris. The chain was particularly successful, and the couple were able to afford an upscale home in Friendswood, Texas and luxury cars, including Clara's Mercedes-Benz. The couple had married on February 14, 1993, and were raising three children, twin sons born in 1996 and David's daughter Lindsey from a previous marriage.