Is why in Soviet times illegal border crossers just got shot. Safer for all involved. (http://www.autoadmit.com/thread.php?thread_id=4004191&forum_id=2#36261897)
https://www.law.com/texaslawyer/2018/03/26/family-of-mexican-teen-shot-by-border-patrol-cant-sue-split-court-rules/?slreturn=20180517182318
If the bullet hits you while in Mexico -- no lawsuit. If it hits you in the US -- can sue. (http://www.autoadmit.com/thread.php?thread_id=4004191&forum_id=2#36261931)