The cellphone video is vivid. A Border Patrol agent aims his gun at an unarmed 15-year-old some 60 feet away, across the border with Mexico, and shoots him dead.
On Tuesday, the U.S. Supreme Court hears arguments in a case testing whether the family of the dead boy can sue the agent for damages in the U.S.
Between 2005 and 2013, there were 42 such cross-border shootings, a dramatic increase over earlier times.
The shooting took place on the border between El Paso, Texas, and Juárez, Mexico.