As Annie dug deeper, she discovered that several guests had been in the dressing room around the time the necklace went missing. There was James, Mrs. Harrington's nephew, who had a history of shady dealings. There was also Emma, a young actress who had been performing at the gala and had been seen admiring the necklace earlier that night. And then there was Mr. Jenkins, a business rival of Mr. Harrington's, who had been overheard arguing with him earlier in the evening.
As Annie pieced together the evidence, she began to form a theory. She remembered a small detail that Mrs. Harrington had mentioned earlier - a torn piece of fabric caught in the display case. Annie realized that the fabric must have come from the dress of the thief.
As the police arrived to take James into custody, Annie couldn't help but feel a sense of satisfaction. The case was solved, and the Harrington family heirloom was safe. Mrs. Harrington thanked Annie profusely and promised to never underestimate her sharp wit and stylish detective work again.
Annie decided to pay a visit to each of the suspects, starting with James. She found him lounging in his apartment, playing video games. He seemed nervous and fidgety, but Annie wasn't convinced he was the culprit.
With newfound confidence, Annie returned to Mrs. Harrington's mansion and gathered all the suspects in the library. She revealed her findings and, with a flourish, produced the torn fabric, which matched the dress of none other than James, Mrs. Harrington's own nephew.