guys getting beaten up

when I was 14 3 jerks at school were picking on my friend,he was in a wheelchair so I told them to stop. Two of them grabbed me and shoved me into an alley and the other one shoved my friend in his chair to the alley. All 3 of them were around 17 years old, I was 14 and only 5'9" tall and about 110 pounds. They made my friend watch while they took turns holding my arms back real right and they would back hand my across the face making my nose and mouth bleed and punch me hard in the stomach and belly button area until I nearly passed out. Then they let me fall on my face and they kicked me in the ribs and stomach. When they were done with me they gave my friend a gut punch and a slap in the face then left us there. It took a while before I could get up, but when I did we told the police and the 3 boys were found and they were charged. we never saw them again