Officer Leonard Mullenax was shot and killed while on an undercover operation to buy illegal alcohol. During the purchase, a struggle ensued and Officer Mullenax was shot three times by the suspect. The man was not indicted for the murder because there were not enough witnesses.
Officer Mullenax was a U.S. Marine Corps veteran of the Korean War and had served with the Dallas Police Department for eight years. He was survived by his wife and daughter.