He names four suspects to the police, three of whom he knew from his time in the SIB : a prominent gangster, " Digger " Malley, that Strike had anonymously investigated and privately testified against ( but whom Strike believed was still unaware of Strike's role in the case ), a paedophile, Noel Brockbank, that he'd investigated and gotten discharged from the military, and an ex-squaddie, Donald Laing, that he'd defeated in a boxing match and later investigated and gotten convicted for physical abuse of his wife and child.