Arbroath Smokie Slaying

On a culinary tour of the British Isles, a retired detective and a failed police dog intend to taste the kippers that made the town famous ...
... but when the first person they meet turns up dead a few hours later in an apparent suicide neither one of them believes, both man and dog must accept they've stumbled into another mystery.
All too soon, they wish they hadn't poked their noses in because what they have uncovered could be truly sinister.
Hidden in the past, a crime few know about yearns to be revealed, but there are some who will do anything to ensure the secret never sees the light of day.
Is the slaying finished?
Baking. It can get a guy killed.