Survive the Night (Harmony Grove #4)
Carol J. Post

Harmony Grove Police Officer Alan White has lost a good friend. He vows to help the Sheriff’s Department in any way he can, even if it means working alongside the woman who left him with a rejected ring and lots of excuses.
They fight the resurgence of long-buried emotions while working together to solve the case. The only connection between the victims is their approximate age and that they are beaten, strangled and left in the woods, with pictures mailed to the local newspaper shortly thereafter. Eventually, the investigation leads them to a decade-old incident on a college campus…and the realization that Lexi is a shoo-in for the killer’s next target.