BBC News: Row over 'agonising' Ohio execution of killer Denis McGuire
US lawyers are preparing to challenge Ohio's choice of death-penalty drugs after a murderer took 25 minutes to die from a new cocktail of chemicals.
Dennis McGuire, 53, suffered an "agonising" death in violation of his constitutional rights, lawyers said.
McGuire family lawyer Jon Paul Rion says he intends to launch a legal challenge against the new drug.
Witnesses said McGuire, who raped and killed a pregnant woman in 1989, gasped for at least 10 minutes before he died.
Does America still call itself the leader of the free world?