An Oklahoma inmate executed amid a legal challenge over lethal injection began complaining about the effects on his body before the drugs were administered, prompting some to question whether he may have exaggerated his symptoms to help his fellow death row inmates' case. Charles Warner, who was executed Thursday for the killing of an 11-month-old girl in 1997, said during his last words: 'It feels like acid.' The comment came before any of the lethal drugs were administered and while he was only receiving a saline drip through an intravenous line.