The contents on the A4 paper still have a second half—
[When killing Aoyagi, do not let their flesh and blood get on you. The Aoyagi fear flames, only by burning their remains thoroughly with fire can you prevent new Aoyagi from being born from the flesh.]
"Even the method of handling it is given, the person providing the information sure knows a lot..."
Kamiyagawa withdrew his gaze from the paper.
In any case, the person secretly reporting to the Countermeasures Office is indeed considerate.
So considerate that it's hard not to suspect that this person might have some subtle connection with Anyu Kamigami, or even the Ushi Time worship.
The "Aoyagi Murder Case" surfaced to the Countermeasures Office's attention, without needing much guidance from Kesshou Makenyu and Kamiyagawa, the two senior personnel, it quickly drew focus.