A drug-induced suicide, misadventure, or a cleverly calculated murder? London detective Charlotte West takes on Scotland. An employee of an investment bank is found dead in his car by a freshwater loch in Ayrshire, Scotland, but there are few signs of foul play . Indeed, that the man had enough opioid painkillers in him to fell a shire horse, might easily be put down to over-exuberant self-indulgence. But newly promoted and in charge of the investigation,...