HUNTSVILLE, Texas (AP) — Convicted killer Bobby Lee Hines was executed Wednesday for strangling and repeatedly stabbing a suburban Dallas woman at her apartment 21 years ago.

Hines, 40, was 19 and on probation for burglary when he stabbed 26-year-old Michelle Wendy Haupt 18 times and strangled her with a cord. Haupt had moved from the Pittsburgh area to Carrollton to work at a computer company in Dallas, and Hines was staying next door with a maintenance man for her apartment complex.