In Nancy Drew: Midnight in Salem, Nancy can investigate the spooky scarecrow ghost in the forest past the cemetery. Click on the piece of paper sticking out of the arm on the left. Later, when you are in the museum, step up to the flyers on the counter. Use the torn flyer piece on the display to enter inspection mode. Double-click on each flyer for Nancy to comment on it.
Right-mouse click over the flyer piece to rotate it, and left mouse click and drag the piece to hover over the flyer you are examining. The correct flyer to match is the second from the left, the Historical Witch Tour. Adjust the torn piece until your cursor changes and lights up yellow over the correct area. You can talk to Olivia about this if you’d like. Doing so will eliminate the piece from your inventory.