Porvenir massacre: Did US army have larger role in 1918 killings?

The first archaeological survey of the site of Porvenir, where a century-old massacre occurred at the US-Mexico border, has discovered bullets and cartridge casings for US military weapons.

A ballistics analysis has raised new questions about the role of the US Army in the 1918 Porvenir massacre, where Texas Rangers killed 15 unarmed Mexican boys and men. The new evidence collected by David Keller, an archaeologist at Sul Ross State University in Texas, and colleagues suggest the US army could have played a bigger role in the massacre than previously thought.