Wake by Shelley Burr

 Private investigator Lane Holland contacts Mina McCreery because he needs the sizable reward money that solving her sister Evie's disappearance will bring in. Evie disappeared as a child almost twenty years ago on the family property in a remote part of New South Wales. The unsolved case still holds the public's interest which, along with the trauma of not knowing what happened to Evie, makes it hard for Mina and her father to move on. Mina slowly begins to trust Lane and opens up to him about details of the case, but might Lane have another reason he is so eager to solve the case? Wake is a great read-alike for Jane Harper and Scrublands by Chris Hammer.