Mean Machine by Aleksandr Voinov

For a boxer ravaged by guilt and in deep denial of his desires, a fight beyond the ring might yield his greatest prize. In a dystopian UK devastated by austerity and ruled by corporate interests, Brooklyn Marshall was a happily married London police officer—until an accident resulted in the death of a protester connected to a powerful family. Now he takes out his anger and pain on his opponents, fighting for the company that took him into stewardship after his conviction and disgrace—and which all but owns him. Wealthy barrister Nathaniel Bishop fulfills his dream of a family when he adopts a daughter. He can’t resist researching her allegedly violent criminal father, but Brook isn’t at all what he expects. He’s fascinating… and maybe worthy of redemption. Through legal sleight of hand, Nathaniel thinks he can overturn Brook’s conviction. Brook has learned the hard way not to trust anyone, let alone a privileged man who’s purchased his “time.” But as they get to know each other, he allows himself to hope. With his fights getting deadlier, hope might be the only thing to carry Brook through.