isis shows peter kasik has been killed. the propaganda video not yet verified by nbc news shows a masked militant standing over who he claims to be the 26-year-old captured by isis over a year ago while delivering humanitarian supplies in syria. while in captivity, he converted to islam and changed his name. today his parents are asking for privacy. they've released a statement that reads in part, quote, the family respectfully asks that the news media avoid playing into the hostage takers hands and refrain from publishing or broadcasting photographs or video distributed by the hos ta hostage takers. the national security council has issued a statement saying it is aware of the video and working quickly to verify the authenticity. if confirmed, kassig would be the fifth western hostage