The Hearing (Dismas Hardy #7) by John Lescroart

Hardy's best friend, Lieutenant Abe Glitsky, has kept a secret from him...and everyone else. Hardy never knew that Abe had a daughter-until she was shot dead. It seems obvious that the heroin addict hovering over her body with a gun is the guilty party, and Glitsky has few qualms about sweating a confession out of him. But there is more to this murder-much more. And as both Hardy and Glitsky risk their lives to uncover the truth, others are working hard to stop them.