Can't remember where I saw this but, they had stubble to their face on the autopsy table. So, they probably did not care to shave and may have cut corners on the rest of their hygiene as well. Who knows.
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"Is evil something you are? Or is it something you do? My pain is constant and sharp and I do not hope for a better world for anyone. In fact, I want my pain to be inflicted on others. I want no one to escape."
- American Psycho - Bret Easton Ellis (1991)