A Murder Unmentioned, Sulari Gentill

"A newly-discovered gun casts light on Rowland Sinclair's father's death some thirteen years earlier. The whole Sinclair family has ducked the issue, keeping secret the fact that Sinclair senior was murdered. A murder the family would prefer stayed unsolved. Rowland's nemesis, right-wing New Guard leader Eric Campbell, uses his influence to set the police to renew their inquiries into Henry Sinclair's death. As old wounds tear open, the dogged loyalty of Rowland's inappropriate companions is all that stands between him and the consequences of a brutal murder."