Washington:
Texas executed on Wednesday a man who killed a police officer outside a nightclub in 2001, the 12th person put to death in the US state this year.
Licho Escamilla, 33, died by lethal injection at a Huntsville prison at 6:31 pm (2331 GMT), said Jason Clark, of Texas Department of Criminal Justice.
Escamilla, who was 19 at the time of the crime, was already wanted for another murder when he became involved in a brawl in a nightclub parking lot.
Off-duty police officer Kevin James, who was working as security, was shot dead as he and other off-duty officers tried to break up the fight.
Escamilla showed little remorse during his trial, according to those present.
The US Supreme Court had refused to review the case and the Texas Board of Pardons and Paroles declined to grant a reprieve.
The lethal injection is the 24th execution this year in the United States and 12th in Texas, which puts the highest number of inmates to death, according to the Death Penalty Information Center.