China roses / Jo Bannister.

Enhanced descriptions from Syndetics:

A brutal attack on a family friend leads to something darker and deeper for DC Hazel Best and Gabriel Ash. No one ever said: "See Norbold and die." So why would a man from DC Hazel Best's past cross England in order to get himself beaten senseless in this uninspiring Midlands town? Everyone assumes he was looking for Hazel. She can't think why he would; and when David Sperrin wakes up, he can't think why he would either. Amnesia - or something to hide? Flashbacks as Sperrin's battered brain recovers only make the case more troubling. His sharpest memory is of a girl dying in his arms. But who, and how? And why is there no body, no witnesses, no missing persons report? Struggling to make sense of the situation, Hazel turns to her close friend Gabriel Ash for help. But Ash has problems of his own: one of his own ghosts has returned to haunt him. And the stakes are so high there's no one, not even Hazel, he can confide in . . .