Does a ruling apply to a brother who accidentally killed his sister when he was thirteen years old?

If the shooting occurred from the brother to his sister before he reached puberty, and no other signs of puberty were evident in him, then no retaliation (qisas) is due from him, based on the hadith "The pen is lifted from three." Blood money (diyah) is incumbent upon his 'aqilah (male relatives on the father's side), and expiation (kaffarah) is incumbent from the boy's own wealth, which is the preponderant view among the majority of jurists. If he does not possess wealth, he must fast for two consecutive months. Fasting during his childhood after the age of discernment is sufficient according to the Shafi'is, which is the preponderant view. As for the Malikis, they hold the view that fasting should be delayed until puberty.