Did an Iraqi or Afghan person get hurt or killed because they helped your unit down range?

Like many units, mine in Iraq had lots of local elders and tribal sheiks who actively helped us better understand the area, including the enemies operating there, etc. A few of those sheiks ended up getting killed by Al-Aqeda or some group like the Madhi Army. I think about that sometimes and wonder whether it was worth it for them to make that sacrifice. Did your unit experience anything similar?