several different mountain slopes and right up there at the top of that peak where you see two peaks come together at the would tomorrow of the peaks is what we call a saddle. it was in between a saddle that a trail led up where agent ivy lost his life. >> nationwide, 26 border patrol agents have lost their lives since 2012. since 2002. ivy is the first to die from friendly fire. >> this was 1:00 in the morning when the incident occurred so there is a good chance of misidentification. >> there is no lighting out here except what lighting the moon actually would give you and whatever flash lights or light that the agents would have. >> the shootout occurred in a notorious drug corridor where frequently outnumbered agents try to flush suspects in the arms of fellow agents in an attempt to trap them in the the middle. >> we have to do the best we can to try to arrest as many people as we can. we try to pinch them in between the two agents and that very well might have played a part