I have to keep looking the names up in the book.
Tallaindeloth was the one you promised to take the evidence to. You made the deal with an elf called Neralon. He wants to see the evidence first, before you show it to anyone else.
I thought the one who died was possibly part of the evil clan we are investigating, suggesting that they're not all dark elves yet.
That's right! She implied she was a Llianlach.