Between the 1890s and the 1910s, colonial courts in the Sierra Leone Protectorate tried and in some cases executed people accused of belonging to what British officials called the Human Leopard Society, an alleged secret organization said to carry out ritual killings while members disguised themselves in leopard skins and used a distinctive clawed weapon so deaths would be blamed on real leopards. K. J. Beatty's 1915 book on the Special Commission Court trials presents the society as a real and organized threat, uncovered by patient colonial investigation and built substantially from confessions extracted under the pressure of the trial process itself.
Later historians have read the same record differently. Christine Whyte's 2016 study of the 1912 trials situates them inside a wider colonial anxiety about African secrecy, arguing that British administrators, primed by earlier panics elsewhere in the empire, interpreted ambiguous evidence of ordinary homicide through a ready made template of organized ritual murder, and that the special courts then produced confessions confirming what they already expected. On this reading the society was less a discovered organization than a colonial construction assembled from real killings and a preexisting European narrative about African secret societies.
No consensus resolves this, and this atlas states both readings rather than adjudicating between them. What is documented is that Poro provided the backdrop the colonial account drew on, since Poro's authority over secrecy and communal justice made a hidden killing society plausible to colonial officials. Ekpe, the leopard associated title society of the Cross River basin far to the east, is an unrelated tradition and should not be confused with either reading of this case.
Sources Human Leopards: An Account of the Trials of Human Leopards Before the Special Commission Court, with a Note on Sierra Leone, Past and PresentK. J. Beatty with The Strangest Problem: Daniel Wilberforce, the Human Leopards Panic and the Special Court in Sierra LeoneChristine Whyte