Family members of a condemned Ohio man who took 26 minutes to die have threatened a lawsuit and new questions are arising about the ability of states to carry out executions.

Death row inmate Dennis McGuire made loud snorting noises Thursday during the longest execution since Ohio resumed capital punishment in 1999.

McGuire's adult children said Friday it amounted to torture. The convicted killer's son, also named Dennis, says nobody deserves to go through that.

McGuire's attorney and an anti-death penalty group are calling for a moratorium on executions.

The 53-year-old McGuire was sentenced to die for raping and fatally stabbing a pregnant woman in 1989.