A few minutes later, Felix stepped into the restroom that had been sealed off. It was a fully enclosed space, with no windows—just a single ventilation fan. That meant there was only one entrance and exit.

He examined the body sitting upright on the toilet in one of the stalls.

The man's head was resting gently against the tiled wall. His pants were already pulled back up and fastened, clearly indicating he had finished using the restroom. More importantly, it was obvious no one had touched o