I have heard of a nurse.

She worked in a nursing home for nearly ten years, and all the elderly residents liked her.
When family members came to visit, she would stand in the corridor and chat with them, asking what the elderly person ate today and how they slept.
When the elderly passed away, she would go to hug the family members and say, "He passed away peacefully, without pain."
Later, someone discovered that the mortality rate of the elderly she cared for was unusually high.
After an investigation, it was revealed.
Every time the elderly "departed peacefully," she was on night shift.
What was most chilling wasn't what she did.
It was that when she hugged the family members and cried, the tears were real.