After Anna by Theda Black

Will and Tyler are partners on the police force, best friends ... and maybe more. But Tyler's got a secret that could end their relationship before it ever begins. When Will's girlfriend dies, Tyler supports him in every way he can, even when Will's increasingly self-destructive behavior endangers them both on the job. And as Will withdraws further, a desperate Tyler can't keep his feelings hidden anymore. But Will doesn't turn his back on him. In fact, Will might have some feelings of his own he's kept hidden. The trouble is, Tyler's kept more than one secret. He knows something about Anna's death - something that could end their relationship for good.