A convicted killer was executed yesterday 16 years after he shot four people to death in Oklahoma.
Gilbert Ray Postelle opened fire on the victims, James Alderson, 57, Terry Smith, 56, Donnie Swindle, 49, and Amy Wright, 26, at a trailer park home in 2015.
He later claimed he didn't remember the killings, which were carried out using an AK-47 rifle, because of his heavy use of crystal meth in the preceding days.
The shocking massacre happened on May 30, 2005 in Oklahoma City.
Postelle, who was 19 at the time, carried out the attack believing Mr Swindle was responsible for a motorbike crash which left his father, Earl Bradford Postelle, disabled.
His brother David Bradford Postelle was sentenced to life in prison, while another man, Randal Wade Byus, admitted lesser charges.
His father, who is said to have pushed his sons to carry out the attack, was deemed unfit to stand trial and has since died.
Postelle, 35, died yesterday at 10.14am after being given a lethal injection at Oklahoma State Penitentiary.
The killer's final meal consisted of 20 chicken nuggets, fries and a chicken sandwich, officials announced.
His proposed capital punishment sparked large protests outside the prison, with opponents claiming lethal injections were unconstitutional.
His lawyer, Robert Nance, previously said the killer suffered learning difficulties and told the Pardon and Parole Board: "He's a different man than he was.
"I think he needs a certain amount of forgiveness because he grew up in an environment that was almost exclusively negative."
Postelle later said he understood that he was guilty and told the victims' families: "There's nothing more that I know to say to you all than I am truly sorry for what I've done to all these families."
