A South Carolina man sent to death row twice for separate murders has been put to death by lethal injection in the state’s sixth execution in nine months.

South Carolina man Stephen Stanko died by lethal injection3. Stanko was convicted of killing his friend and girlfriend in April 2005, and also sexually assaulted his girlfriend's daughter.

After he killed his 43-year-old girlfriend, Stanko then drove 25 miles north the Conway home of one of her friends, a 74-year-old man named Henry Lee Turner, a retired Air Force master sergeant and a father of three. He fatally shot Turner, whose body was found about 24 hours later, and stole his truck.

Serial killer Stephen Stanko was just executed, but the arguments from neuroscience that failed to save him still have force.

Stephen Stanko was sentenced to a rare double death penalties for two murders committed near Myrtle Beach, South Carolina

Stephen Stanko was convicted of killing his live-in girlfriend as he raped her teenage daughter, then shooting a friend and cleaning out his bank account.

Stanko's case made national headlines after he fled the crime scenes. He ended up in Augusta mingling with Masters golf fans and wooing another woman.

Stanko chowed down on a cherry pie and banana pudding in his last hours, opting for a sweet treat after a hearty meal. The killer then made a three-minute statement at the Columbia state prison, South Carolina, before being killed. He asked to not be judged for his crimes and apologized for his killings.