Aspects of the characterization are subtle deep inferences. This isn't a Law and Order show, every line, scene, and plot point has a meaning.
The prisoner telling Nazir, who he always calls by his full name, that Veal is made soft by being kept in a dark crate, sheltered from the outside world, which is cruel and terrible. That's a direct metaphor to Nazir himself, who has been sheltered from the realities and cruelty of the World.
John Stone's eczema is giving our typical protagonist flaws, and also meant to hint that his good nature and motivations are resting on a rotten foundation. We all struggle with problems, and life is our struggle to deal with them in our own way. This isn't a murder mystery. This is an unforgiving look at the "system" and the darker side of the American justice system.
Being arrested is terrifying, prison isn't suitable to human beings, and as we'll see that instead of "rehabilitation centers" they will turn Naz (as they tend to do in real life) into criminals. Ironic that our rehabilitation centers do the opposite of their stated purpose. This show is a political statement through and through. The callousness of the system, and it's effect on anyone who is unfortunate enough to be caught up in it (innocent or not), mass incarceration, how we treat prisoners, how DA's basically barter with people's lives like livestock, and the disconnection of it all. If having Nazir's mom frisked, the multitude of forms, the only way for the cab to be released is for the father to press charges on his son, lawyers interested only in fame and not the well-being of their client, more forms, more disconnection, even more forms, and the fact that the police can walk into your home and take your property just because of a family member was charged with a crime wasn't heavy handed enough then?
Our prison system needs a reform, and this show will wake a lot of people up to just how terrible it is. A&E ran a program called "40 Days In" where they put civilians in prison for a couple weeks to catch both prisoners/guards breaking the law/rules. One of the volunteers was a law enforcement officer. She broke down inside, and when it was all said and done she retired from her job as a cop because she didn't realized she was responsible for putting people in conditions that she thought were inhumane.
It's what you want our prison system to be. Rehabilitation it is not. It's revenge. Most correctional facilities down here in Louisiana, where it can reach a head index of 115+ with humidity don't even have air conditioning. I've had friends go in for six months and come out completely different people, and not in a good way. They've come out criminals, when they went in for things that should have been slap on the wrists. They talk different, they scuff down their food like they're afraid of people stealing it, they seem to lose their morals and values typical for most civilians. Doing time in America is no joke, and then when you get out you get branded as a "felon" for life.