Well it's obvious you have no idea about being a police officer and have no idea of how the real world works. Very little goes according to plan all the time and police aren't perfect everytime.
Mistakes happen and when the cops think they have a wanted man they can't dilly dally and himhaw about what to do. They grab them and sort it out because there is no time to waste. And guilty or not they all say the same things I didn't do anything, it was someone else and so on so they have to actually verify that.
Shit happens in life and most of it is a big hassle and a pain in the ass. To think otherwise is incredibly stupid. And for this kid, this is one of those moments. These moments happen to everyone whether it involve the cops or not.
In this day and age it's nice to see police out there doing their job at least unlike a lot of places where their hands are tied while criminals run around free. A few people being inconvenienced here and there is a insignificant price to pay for police doing their job.
The kid deserves a explanation , a handshake, a apology and a steak dinner on the police department for him and his parents.