WHo is the murderer  of lorna kepler in Sue Grafton's book "k" is for killer

Dear mrkymrklr01-ga,

I double checked this with two librarian colleagues, one of whom
facilitates a library mystery book discussion group just to be sure
that I was on the right track.

K is for Killer is the Sue Grafton mystery that leaves the reader
hanging in the end. Kinsey Millhone names Roger Bonney as the killer
of Lorna Kelper (p. 278), however it is all speculation and some bit
of revenge for the death of Danielle on Kinsey's part. At the end of
the book, Roger disappears and we never get any resolution.

Hope this helps.