Does the person who placed the stones on top of the barrel cause the child's death?

If it is established that the child's death was caused by a stone placed by the uncle, and the uncle was negligent (transgressing) in placing the stone, then he is liable for indemnity (daman), expiation (kaffarah), and the blood money (diyah) is to be paid by his 'aqilah (male agnatic relatives), because the one who negligently causes damage is responsible for what is destroyed due to his action. However, if the uncle was not negligent in placing the stone, then he is not liable for indemnity; because indemnity is conditional upon negligence. Such incidents require referring the matter to the Sharia courts for investigation and to issue a just ruling based on the evidence.