I just read this and it sounds like he was found hanging? I thought that he was found on the floor?
car-a-bi-ner - a D -shaped ring with a spring catch on one side, used for fastening ropes in mountaineering.
Contemporary Examples
The carabiner is a D-shaped metal clamp that has a gate that opens and closes.
http://www.dictionary.com/browse/carabiner?s=t