If I should die / Matthew Frank.

It begins with vicious, apparently motiveless attacks on down and outs in South London. But when one of the homeless victims dies from his wounds, it's murder...For the investigation team's youngest member, Trainee Detective Joseph Stark, death is already all too familiar. Injured in an attack that killed his colleagues, Afghan veteran Stark has enough on his hands just trying to recover without enduring the scrutiny and sideways glances of his new colleagues. The drink and painkillers he's leaning on to keep him going aren't helping. And there's only so long he can ignore the efforts of the military police to speak to him. When one of the victims fights back it soon becomes clear that there's much more at stake than gangs preying randomly on society's weakest members.