[ Fixing day/daytime problems with the Investigation rule, and making it default to one night only, given that absent-mindedly investigating for an extra day could get you killed. Also using the word “quarry” instead of “watched”. ]

Reword the first two paragraphs of Rule 2.13 (Investigation) to:-

During the daytime, a living villager (the Investigator) may secretly inform the Mayor that they are planning to investigate another living villager (the Quarry) during the next night, for that night only.

If it is daytime and a villager was investigating another villager during the previous nightime, the Mayor shall privately tell that Investigator whether or not their Quarry has been “Out at Night” since the last daytime. In addition, if the Quarry was a werewolf whose target was savaged by wolves during that night, the Mayor shall privately inform the Investigator that their Quarry is a werewolf.

And replace “the watched villager” with “the Quarry” in the fourth paragraph.