Is expiation for fasting a month or two months obligatory on behalf of a brother who died in an accident, and can it be divided among relatives?

If the driver took all safety precautions and was not negligent, and then an accident occurred leading to someone's death, there is no blood money (diyah) or expiation (kaffarah) due from him.

However, if the driver was negligent, then the blood money is incumbent upon his 'aqilah (male relatives on the paternal side), and the expiation for unintentional killing is due. This expiation is fasting for two consecutive months for the one who fasts on his behalf, provided that only one person fasts. The original ruling is that the expiation should be paid from the deceased's estate, and it is permissible for it to be paid from the wealth of the deceased's family. Some scholars have stipulated the permissibility of feeding (miskin) as a valid form of expiation for killing.