Yes, but it reeks of desperation when they literally trying to establish Nasir as this monster based only on two occasions of violence in his whole life, which happened at high-school and dealing with the post 9/11 situation. And then trying to inject a grand sinister-ness to selling of the drugs.
It speaks volumes of the flimsiness of the prosecution's case and the actual evidence they have on him. As does the DA having no actual counter argument to all what Katz presented. That the character witness part is what's taking the driver seat shows how crazy it is that the case wasn't shut down before getting to this point. And that's without the additional still unaddressed questions that cast even more doubt on Nasir being the killer.