Florida carries out execution amid scrutiny over botched Tennessee attempt

James Robertson was the state's 17th execution this year, amid scrutiny over failed lethal injection of Christa Pike

• US plan to livestream execution elicits global condemnation

Florida put to death a convicted murderer in the state's first execution since September's botched attempt involving Christa Pike in Tennessee, on Tuesday.

Officials said James Robertson, 63, was pronounced dead after he received a three-shot series of lethal injections at a Florida state prison in Raiford.