Describing a Person-revised

I went aboard with my family. However, on our journey, my brother got lost. Since we wanted to find him back, we went everywhere we had been to. But we couldn't find him anywhere. So we went to the police station for help. And the police asked us to discribe what he looked like. We told the police that he was teenaged, about eighteen years old. In addition, he was very thin and only weighted fifty kilograms. Also, he was medium height, about 172 centimeters tall. His hair was black and straight. After these discriptions, the police promised that they would try to find him as soon as possible.