the field examination

Rating: 8/10 (10 February 2007)

Why was the worker in the field killed (plastic bag on head) after the young girl examined his hands? I understand that you can look at peoples hands to determine "office" vs. "labor" workers, but by this time it seems they would all have hands that looked the same?
Also, does anyone know if there are translations for the Cambodian conversations available? I can appreciate not translating everything in subtitles to immerse a viewer in the feeling, but still... I wanted to know all of the words being spoken.
I felt the one drawback was that in the first part there were LOTS of helicopters shots with not much context.
thanks for any help, just saw this movie today!