The use of electric shock as a method of torture was first documented in Nazi, Germany, but today it is still used as an acceptable use of torture in the United States.
In Gwinnett County, Georgia, an un-edited police videotape shows 31-year-old Deacon Frederick Williams being struck with a TASER five times in 43 seconds, just 4 minutes after being led into the jail. The police video can be found here:
Acceptable Use of Torture in the US
He was handcuffed behind his back and in leg restraints, following an epileptic seizure at his home; an ambulance was called by his wife and son, but the police arrived first. His last words were: "Don't kill me, man. Don't kill me."
No charges have been filed in the torture / murder; the County DA refused to show this video to a Grand Jury, even though another man in custody was murdered just months earlier after being tortured with a TASER by the same police.
Strangely, there wasn't much info on the net about the murder of Deacon Williams. Coverage from some of the local media can be found here