His To Save by Carrie Davis

Sacrifice is the truest kind of love…
Asher Whitehill made a new life for himself, hiding from his family’s dark secrets, but his past still haunts him, and the possibilities of the future terrify him beyond measure. Desperate to atone for his father’s sins, Asher keeps everyone in his life at arm’s length, including Christian Cross, the police officer he loves.
Now the murders have started again, and this time Asher may be left with no choice other than to surrender everything—even himself—to keep Christian safe from the demented plans of a madman.