The Daughter & Father Killers – The Murder of Diane Tilly By Emily G. Thompson Diane Tilly was a well-known and well-loved teacher from San Antonio, Texas. She cared deeply for troubled students and became a mother figure to many of them. In 2004, she vanished. Shortly thereafter, a teenage girl and her father were arrested and a lurid background of abuse and incest would come to the surface. Mar 25, 2020 • 6 min read