Because they were fighting on their own territory and defending their home, the vietcong had greater determination than the US who were not really sure what they were there for.
So when they buried the body with the possessions. It wouldnt smell bad as it decayed. Now days in open casket buriel services the embalm the body to prevent decay and smelly ness
Its the jury because after all the evidence is shown they gather up to get a verdict