Kinsey takes boxes of Libby's things back to the motel room. What does she do and what does she find?

Kinsey fortifies herself with coffee and spends hours going through the boxes. She has just about given up finding anything that helps with the case when a letter addressed to "Darling Elizabeth" falls out of a copy of "Pride and Prejudice." This letter is obviously a letter between lovers. Kinsey puts it in an envelope, planning to have Con Dolan have a look at it for fingerprints and handwriting analysis.