He stole the TV. During a period of lawless violence.
I remember that night well. I remember cowering away from my front windows, while hearing glass breaking at the end of my road as the shop windows were being broken, terrified that the rioters might come down our road and start breaking our windows, or trying to get in.
Nobody who was subject to that violence knew at the time how things were going to go. Those of us not involved felt incredibly vulnerable. There was a complete breakdown in law and order, and we didn't know if we might be at risk of physical harm. It certainly felt like we were in danger at the time.
Ordinary people did not feel safe to go out and be part of that. You say your nephew wasn't violent. Yet he felt comfortable enough to be out on the street while the violence was happening all around, and, instead of moving away, he got involved. To take that TV means he was right in the thick of it. Not concerned for his own safety at all, it seems. Comfortable with who he was with. This says something about him.
You talk about being scared. Well we were scared about that. We're scared about what happens to ordinary law-abiding people when anarchy and violence break out on the streets.
Rioting is always punished harshly by the courts, to set an example and deter others. This is classic FAFO and I'm afraid I don't have any sympathy for him. I don't want people like that around, they make things less safe for the rest of us.