What is the ruling of Islamic law regarding negligence and dereliction of duty that led to the death of a child by drowning in a swimming pool?

If someone causes the drowning of a child due to negligence or dereliction of duty, expiation (kaffarah) is incumbent upon them, and blood money (diyah) is incumbent upon their 'Aqilah (male relatives on the father's side). However, if there was no negligence, then neither expiation nor blood money is required. Leaving a child without a barrier between them and an adult swimming pool is considered negligence and dereliction of duty, unless there is someone entrusted with the care of children. If negligence is proven, then the parents are held liable.