Detective's Authority(探偵権限Tantei Kengen) is a genre convention necessary for compliance with Knox's 8th (or Van Dine's 1st.) No matter how expansive or restricted this authority is granted in the story (or by the Game Master), the detective must not be hindered in discovery of clues necessary to solution. The detective's inspection is to be considered exhaustive to the extent that it obviates any Devil's Proof; clues not yielded to the detective also eliminates any resolution those clues would have proven.