Add some time before flies eat the dead body.

[bahhh 83]

Put a delay like 5 to 10 mins.

This would give a moment where you would find a fresh corpse and realize that this is a fresh kill.

It would be much more intense if you find a fresh corpse realizing that the danger could be still out there.

It's more realistic in a way, and it could add more emotional and intense moments.

[Lukio (DayZ) 24]

Either that or when you investigate the body, it tells you who it is, how it died and how warm the body temperature is.