If a person does not know whether he was the cause of an accidental killing or not, is there anything required of him?

Question:
The questioner says: My mother gave birth to a baby girl, and my mother was very ill, to the point that she was unaware of what was around her. They placed the baby with her to nurse her, and she woke up the next day and found her dead, with blood coming out of her nose. She does not know whether she stepped on her and did not feel it, or whether she died a natural death.

Answer:
If it is established that she died because of her, she owes an expiation. She owes an expiation of fasting two consecutive months, and her blood money is on the woman's 'aqilah (clan), because this is an accidental killing. However, if she died without the woman being the cause, and she died by divine decree and destiny without any causation from the woman, then she owes nothing. This requires determining the cause of death, and determining the blood money if they are demanded to pay it. Yes.