The Chief Inspector had asked all members of the household to join him in the study.
This included the estate’s ground staff and several family members and guests that had been present at the time of the murder. Before long, more than twenty people had entered the room and found somewhere to sit. Apparently, he had cracked the case and was going to explain how the murder of the lord of the manor had been committed and by what extremely cunning means it had been carried out. As a result of the corpse’s blueish skin colour it was established that it was a case of nitrate poisoning.
However, the perpetrator would never have been suspected and found out if the inspector had not been called in on the case to bring to bear his many years of experience. The carrying out of the crime was so unbelievably devious that only a full explanation of how it was done would put all innocent parties at ease.
Unfortunately, he had hardly opened his notebook when his face turned blue.