Byron Black's implanted defibrillator did not shock him during his lethal injection by the state of Tennessee Aug. 5, according to his attorney who said she evaluated data from the medical device.

After the execution of Byron Black on Aug. 5, witnesses are slated to speak at a news conference outside the prison.

Tennessee executed death row inmate Byron Black on Tuesday despite raised concerns about his implanted heart device, which could cause a "prolonged and torturous execution."