前世の記憶が役立つとは思えません

【I Was Doted on for My "Make-Believe" Deductions!?】 Alisha, a low-ranking noble, possessed memories of her past life. However, she had no special skills to speak of; she was just an ordinary lady who, in her previous life, lived a plain life just watching "two-hour mystery dramas." Then one day, she happens to be present with Valdi, a Duke's son, when they discover a woman's body... This is that scene I saw in a drama!! "The culprit... might still be in the room——"