I found the story unnecessary long. I was engaged until she found the girl, but then she also goes to find this other new girl... it was the same chase all over.
Something that annoyed me was the reference to one character as " 'new boy' Dave" over and over. I mean, I got that Dave was the new guy in the force, no need to call him that every time. The technique reminded me of the book The Keeper of Lost Causes but while I enjoyed in that one, in The Night Ferry it just annoyed me.
I liked Alisha's character throughout. My dislike of the book had to do with with length which I found kind of repetitive, thus not needed.
A shorter story would had worked best.