Crucifixion Creek by Barry Maitland

Afghan war vet Harry Belltree is a Sydney homicide detective, convinced that the car accident that killed his parents and blinded his wife, Jenny, was a criminal act. After his brother-in-law, Greg March, is murdered and two other violent acts happen in close succession, Harry goes beyond the law when the trail leads to a motorcycle gang called the Crows and possible government corruption. He is aided in his quest by Jenny and newspaper reporter Kelly Pool. Crucifixion Creek is the first book in a trilogy by Maitland, author of the long-running Brock and Kolla police procedural series set in London.