Huntsville, Texas ? A train-hopping serial killer linked to at least 15 murders near railroad tracks around the country said “I deserve what I am getting” before he was executed Tuesday night in Huntsville.

Angel Maturino Resendiz mumbled a prayer, saying “Lord, forgive me. Lord, forgive me,” and acknowledged the presence of relatives watching through a nearby window.

“I want to ask if it is in your heart to forgive me,” he said as he looked toward the relatives of victims in another room. “You don’t have to. I know I allowed the devil to rule my life.”

“I thank God for having patience for me. I don’t deserve to cause you pain. You did not deserve this. I deserve what I am getting,” he said.

The Mexican drifter known as the “Railroad Killer” was executed for the slaying of physician Claudia Benton 7 1/2 years ago. She was killed during a deadly spree in 1998 and 1999 that earned Resendiz a spot on the FBI’s Most Wanted list.