You can try to take help from that injured man and can ask him what happened in reality. This person is the victim and also a witness who can help you to be out of all these advanced esquires. He can solve all those extra questions asked by police officers. You can rescue yourself from the harassment and you can also raise your voice and say that this is wrong as a policeman you can’t do this. You should report this to the higher authority to show how rude and bad these cops are behaving with you.