What would you have done if that person was you?
If it was me they were fining, I wouldn't have showed them my 11B and I'd just walk away. They wouldn't be able to do shit because they have no warrant/authority what so ever to ask for identification and I'm not obliged to comply. If they want, they could tail me and call the police. If they manhandled me, I'd lovelovelovelovelovelovelove give them a beating of their life under the act of "self-defence". Some people are just more hot tempered than others, they're lucky they got quite a relac and passive uncle.
Do you guys think that's the reason why they targeted him in the first place?