Spent night at police station

Thought of posting it after some time We are college students living in a pg, one night we got a call from a friend of our friend (let's say J) who stays in a flat, some hostel students around 7-8 came to drink with their friend who shares the same building in the ground floor, as the exams were going on, he and other students asked them not to drink and leave the place, soon it got heated. They brought 10 more hostel students but J locked entry to his floor, he then called us and asked us to intervene but our pg gate was closed, we asked the owner for keys but he refused, after some time we got another call to come to the police station. We jumped down using a bedsheet and matress and saw this delivery guy, asked him to drop us there. We 5 guys reached there, saw a guy bleeding from head and torn clothes, he was J's flatmate. I don't know how he got in their hands, he was telling the whole story to the SI that he was dragged by a bike and beaten. Their complaint was written and the policeman asked the hostel guys to come to the station or he'll take strict action against them, but no one came. We spent the whole night there, waited till the pg doors got opened, had chai sutta and slept. Later got to know, the policeman took 80k combined from the hostel guys and the guy who was beaten got know justice.