You clearly haven't retained anything about the case. As you can even see from the picture, he was not beaten to a coma in his arrest, and later on even gave testimony (not that the testimony was particularly valuable) that was video recorded and broadcast on TV. He fell into a coma after that point. There is zero evidence that his comatose state was related to police brutality, with even his own parents, with full access to his medical records from his vegetative return on, had nothing to cite proving the coma was induced by torture except him having a scar on his foot that they didn't know about and some crooked teeth. No evidence of fractures, no bruising, no dislocations, no chipped teeth, no signs of concussion, nothing.

He most likely contracted botulism, which is more prevalent in the DPRK due to its poverty, or a similar disease while in custody. Because the DPRK had a limited ability to identify the disease and to treat it, it was not able to save him before he became vegetative.

Nowhere in this story is there room for "pigs did a guy to death". The DPRK handling of some jackass US dude flagrantly breaking their laws and trespassing in a military space was humane by all available evidence.