Islamic terrorist group ISIS has beheaded another captive and posted the video on the internet.

Peter Kassig is the third American to be brutally slaughtered by the murderers.

Kassig, 26, had served in the Iraq War and became motivated to make a difference in the lives of the Iraqis after the war ended.  He had founded a group called SERA (Special Emergency Response and Assistance) which delivered food and medical supplies to refugee camps near the Syrian and Iraqi border.

Kassig had written to his parents stating he feared being killed.

“I am obviously pretty scared to die but the hardest part is not knowing, wondering, hoping, and wondering if I should even hope at all,” Kassig said. “I am very sad that all this has happened and for what all of you back home are going through. If I do die, I figure that at least you and I can seek refuge and comfort in knowing that I went out as a result of trying to alleviate suffering and helping those in need.”

The Obama administration confirmed that the video was genuine.