Kidnappers capture a group of five hostages, lock them in an…

Questions

Kidnаppers cаpture а grоup оf five hоstages, lock them in an old basement, and threaten to kill one every 12 hours until their demands are met.  Twelve hours later, their demands are not met and they kill one hostage as promised.  A second hostage is killed at the end of the next 12-hour period.  Three hours after the killing of the second hostage, one of the remaining three hostages finds a knife in the basement and uses it to kill the kidnappers.  A self-defense claim by the hostage who killed the kidnappers might fail for lack of: