Robert Jennings was convicted in the July 1988 murder of a Houston police vice officer. Jennings and co-defendant David Lee Harvell had just finished robbing an adult movie theater when they decided to rob a book store.
Jennings entered the store with Harvell's gun and found the police officer arresting the store clerk for a municipal violation.
The clerk later told police that Jennings simply walked up to the officer and shot him twice, then a third time after the office collapsed.
After robbing the store, Jennings and Harvell fled. When Jennings told Harvell he had shot a "security guard," Harvell ordered him out of the car. Jennings refused and Harvel shot him once in the hand. Hennings was later found and arrested at the hospital.