President Trump.Mr Johnson committed the slayings in Virginia as part of a drug-trafficking ring.The 52-year-old was pronounced dead at 11.34pm local time on Thursday, following lethal injection with pentobarbital.He was put to death at the US Department of Justice's execution chamber in Terre Haute, Indiana.His lawyers argue he had an intellectual disability, meaning it was unconstitutional to execute him.His crimes included shooting a rival drug dealer, killing a woman who hadn't paid for crack cocaine and shooting a man at close range who he suspected was working with the police.His lawyers released a statement, saying Mr Johnson apologised to the families that were victimised by his actions.It read: “On the streets, I was looking for.