If you said "should violently killed NPC's shed some blood or miss several limbs, maybe even spill some guts if not loosing head" I would support this tread.
Most certainly it is usual for the eyes to be open if death it occurs when awake.
This one she is not sure about when asleep. If khajiit must work at night then she usually does not stay around long enough for anything more than a quick ruffle in the pockets.
By khajiit she means that Argonian ... that one over there.
Dead people also pee and poo because their intestines relax. Eyes open is normal unless you died in sleep I think.
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"I am a nightblade. Blending the disciplines of the stealthy agent and subtle wizard, I move unseen and undetected, foil locks and traps, and teleport to safety when threatened, or strike like a viper from ambush. The College of Illusion hides me and fuddles or pacifies my opponents. The College of Mysticism detects my object, reflects and dispels enemy spells, and makes good my escape. The key to a nightblade's success is avoidance, by spell or by stealth; with these skills, all things are possible."
People often die with their eyes open. The whole "closing a dead person's eyes" like on TV doesn't work irl either - the muscles mean the eyes will shoot open again.
Strange fact - in real life, undertakers will place small "spikes" on the eyes to keep the eyelids shut for funerals etc.