Death of a Ladies’ Man by Helena Marchmont
Alfie's life in London merges with his life in Bunburry in Death of a Ladies' Man. This is the fourth in the series and can stand alone, but it would be much better to go back and read them all. They're short and enjoyable, and like most series it's better to read them in order.
Two of Alfie's acquaintances from London show up. They are gaudy and snobbish and want Alfie to invest a bunch of money in some scheme or other. Also in town is Mario Bellini, who makes the best ice cream in London. Mario makes a bit of a stir in town. He's handsome and an irrepressible flirt who makes at least one local husband quite angry.
Alfie loves the ice cream and gives Mario his card so he can have some shipped. Unfortunately, when Mario is found dead, Alfie's card is still in his pocket, and the incompetent sheriff at first focusses on that. But the jealous...