. ♪ ♪ sarim told us he'd just recently escaped from eritrea. >> sarim (in tigrinya): >> narrator: intrying to cross the border and taken straight to prison with untreated wounds. >> sarim: >> narrator: sarim told us he was held like this for two years and three months. >> sarim: >> narrator: in our interviews with refugees, one prison kept coming up: wi'a camp. it's in the danakil depression, one of the hottest places on earth. >> tesfay (in tigrinya): >> narrator: tesfay said he was held at wi'a as punishment for trying to flee military service. >> tesfay: >> narrator: daniel, a christian pastor, and kiros, a soldier, were also detained in wi'a prison camp. they say that they too were held in the underground cell known as "the oven." >> daniel (in tigrinya): >> kiros (in tigrinya): (protesters shouting, whistling) >> u.n., shame on you! u.n., shame on you! u.n., shame on you! >> why is everyone lying? why is everyone lying? u.n., stop, stop, stop! (people shouting, horns blowing) >> narrator: in june 2016, the u.n. investigators were ready to announce their findings. >> hands off er