btw I don't see how the risk of dealing with the boarder crossers is any different than that of a normal policeman dealing with criminals. Granted the work place might be a bit though, but not likely much wore than being a cop in a slum city. Hell I'd do it, if I needed a job and lived close to our boarder.
Different… ok for one thing Environment- poisonous snakes, scorpions, cacti, sentry plants, cats claw, ocotillo, 100+ degree weather, no running water, constant flat tires because of rocky terrain, no tow truck or AAA, no cell service, backup is hours away (no SWAT),town is hours away, toilet is many miles away, hospital is hours away, ISOLATION, on top of that you have to figure they know your routes, they know your name, where you live and where your family sleeps …. Then you add military (some cases American trained) hostiles with state o’ art weaponry escorting drugs across who have no qualms about shooting your arse and dump lye on your body to save their paycheck. Yup, sounds just like the city....