Chapter 42 of Shadow Souls(pg 582-583)

Shinichi let out "secrets" who do you think fits them...

-One of them is a murderer(not a vampire)not a mercy killing or anything like that
-True identity of sage...
one of them had their memory erased and not Damon or Stefan
-Secret stolen kiss
-The night in the motel(ask her about her about her theories of Camelot)