Savage by Jordan Silver

Nick Sheridan has known loss all his life. When he was seventeen, he lost the love of his life. More than twelve years later his family was murdered. Now Nick has grown tired of life and all the curve balls it’s thrown his way. There’s a madman on the loose eliminating drug dealers, the same dealers who murdered Nick’s family, and the brass wants him to take him down.

As a lieutenant, he’s sworn to uphold the law but Nick no longer cares. There’re only two things he gives a damn about, vengeance and reclaiming the love he’d lost, and nothing and no one is going to stand in his way. Not even the girl whose heart he’d broken those many years ago.