New Clue

From: Mr. Black
Description: It looks like there’s no one in the sculptress’s house after all. I didn’t find any traces of Sophia here either. Apparently, the witness was mistaken. We’re leaving.\n Wait a minute! What’s that between the floorboards? Let’s find out... Lend me your tools.
Completed: With the help of your tools, I managed to get Sophia’s brooch from under the floorboard! I saw it earlier on Miss Haze’s poster. The missing singer was here after all! Be on your guard - it’s very likely that the singer’s kidnapper, who almost eluded us, is still hiding in the building!