. >> just around the corner, we find olga valadez, the mother of 23 year old carlos ivan de anda. her son was one of the men in the car. he tried to escape his attackers, and ran home. he made it as far as the front step. >> later that afternoon, the death toll climbs. on this saturday, it will reach 16. three young men have been gunned down at a car dealership. later, we learn that two are us citizens and have been attending private high schools in el paso, where their families have moved to safety. so when we got here, this is a really busy road, 7-8 lanes across right through downtown, and traffic was going by. now they've blocked off all traffic completely - and the media was here, there was local media. now the media have all left. the speculation at the scene here is that this is a very unsafe place to be because it seems like this was a very powerful family that this happened to. >> let's go... >> yet another execution, here in the middle of a major intersection. a municipal police officer who had just finished his shift, is slumped over the wheel of his truck. we watch as