Thank you for the translation, as always!
And btw, on page 13 (15 on Mandadex), Kanoko says "You said, 'I don't know', that's a lie...!!".
That was referring to someone else, she wasn't talking to the detective, but the murderer in chapter 1: https://mangadex.org/chapter/458563/49
So it would be "He said, 'I don't know', that's a lie...!!"