[sufue]

A Traitor's Crime looks to be a non-series title by Roderic Jeffries, although I can't find it in SYKM. Perhaps it was originally published with a different title, but in any case, it's free right now at Kindle US and UK.

Kindle US: https://www.amazon.com/dp/B016AKLNCC
Kindle UK: https://www.amazon.co.uk/dp/B016AKLNCC

Spoiler:

John Keelton, Chief Constable of Flecton Cross, lives a dutiful and honest life.

A loving husband, father and honourable policeman, he is content and appears to have come to terms with the sudden loss of his son from a drugs overdose.

However, cracks soon begin to emerge: promotions have been denied and his judgemental, tunnelled vision interferes with his job and his family.

His fight against criminals and drug dealers consumes him and clouds his judgement as suspicion and paranoia force him to seek justice above anything or anyone else.

But not everyone in the police force is as loyal as Keelton and he is dismayed and hurt when a weak link appears in his own tight knit team.

It becomes unbearable for him to believe that one of his detectives would turn traitor.

His daughter Joanna adds to his troubles as she pursues a relationship he thoroughly disapproves of and ends up complicating his investigation.

Can he salvage his relationship with Joanna and his wife Mary as well as weeding out the poisonous detective?

Or will he be forced to choose between his work and his family and lose everything in the process?

Tense and exciting, A Traitor’s Crime is impossible to put down until the events in the Flecton Cross police station have been brought to their thrilling conclusion.