Murder in Retribution

As Detective Sergeant Kathleen Doyle settles into her surprising new role as Acton's wife, a new slate of homicides thankfully comes along to distract from the firestorm of gossip.
It appears that two underworld factions are engaged in an escalating turf war, with Scotland Yard unable to do much about it, other than tally up the body-count and await the discovery of the next victim.
Since Chief Inspector Acton is not one to be stymied, Doyle can only assume that her new husband is not overly-motivated to solve these underworld killings-which is not right, in Doyle's mind. Murder is murder, no matter how justified the killer's actions may seem. . .