Love Kills — Bob Moats

Sam Hunt and h is friend Detective Royce go on a hunt to find a kiiler of women. His first kill came from a dating site and the woman was found raped and strangled and left next to a dumpster. They contact a dating service and got a list of men who the victim had contacted. The list doesn't turn up a suspect but more women are being murder with the same MO. This is the fourth book in the Sam Hunt series and is a novella, shorter than a novel but longer than a short story.