You succeeded in your experiment with the format! This story did right by the tag and delivered a disturbing piece, Tristan. A man trapped in a room with a serial killer with nothing left to lose who slowly realizes that he's been offered up for the enjoyment of both the deranged man and those who should have been protecting him.

You've good timing with your details, as the dawning realization of the drawing's implications strike both the readers and the protagonist at the same time.

But I, a stubborn, deaf young man

This detail pulled me momentarily from the story, as there were sounds included that come from the reporter's perspective. One example being the description of the pitch of Mr. Dankworth's voice, something someone who was deaf would be unable to hear. Many who are deaf have adapted to the reading of lips (or perhaps the recorder had the words scroll for the reporter to read) so Dankworth's speaking itself wasn't jarring. Not meant as a criticism, more a helpful observation on how clashing these details can be.

~Bris