It's more of a comment on the whole story arc (not about this chapter), but I'm surprised that the number of people that Yamaoka met in this story arc were actually real people, like Qureshi, Morieda, the Karashimas (and apparently Arora, too).
Meaning the author actually really went that far in researching their names and occupations at that time (and possibly even interviewing them, too), and these people weren't fictional characters the author just made up for the story.