The street gang member who fatally shot a San Antonio Police sergeant and his wife after he "just went crazy" was executed tonight in Texas.

Frank Garcia, 39, was given a lethal injection and pronounced dead at 7:02 p.m. Central time, reports the Houston Chronicle. Before expiring, he yelled "Hallelujah" and shouted, "Thank you for this miracle you are performing in my life. My God is holy, holy, holy. Hallelujah!"

Garcia was sentenced to death for the March 29, 2001 murders. Garcia shot Sgt. Hector Garza, 48, in the head, he later told investigators, because he knew the officer would be wearing a ballistic vest.

Garcia had earlier killed his wife, Jessica, who had planned to leave him. He shot his wife three times in the head. Garcia, a member of the Angels of Sin gang, used a machine pistol in the attacks, reports the Fort Worth Star-Telegram.