Lawyers for a Georgia man set to be put to death on Wednesday have filed a lawsuit seeking to halt his execution, saying the drug authorities plan to use caused "needless suffering" when it was administered to another death row inmate.
Andrew DeYoung is scheduled to die after being convicted of the 1993 slayings of his parents and 14-year-old sister.
The Georgia pardons board denied DeYoung's clemency bid Monday.
Georgia corrections officials plan to use pentobarbital, first used in Georgia in the June 23 execution of Roy Blankenship.
DeYoung's attorneys cite media accounts of Blankenship's execution, including one by The Associated Press.
AP reporter Greg Bluestein, who witnessed the execution, reported that Blankenship appeared to "grimace and jerk" when the drug was administered.
Bluestein was subpoenaed Monday by DeYoung's lawyers.