expensive search that lasted for weeks and weeks, they decided this was it. saturday, august 16, 2014, would be the last day of the search. >> we felt we had one more shot at it. >> reporter: in the early evening they headed for the very last mine on their list. >> and as nighttime falls out there, you don't want anybody out there still, so we began to really collect our thoughts and decide, any minute now we need to start calling the search. >> a member of the san bernardino cave rescue team, a doctor in fact, came upon this mine and right away noticed a strange smell. >> it was the stench of gasoline. >> reporter: there was also a shell casing resting near the mouth of the mine. the searchers lowered a bucket cam. >> we received a phone call from one of the satellite phones that was out there with the search team and they could see what appeared to be a leg or some sort of a body part down at the very bottom of the mineshaft. >> that is unbelievable that