In 1943, the discovery of a woman's skeleton inside the hollow trunk of a wych elm in England's Hagley Wood began a case shrouded in strange circumstances. Forensic analysis concluded the victim had been suffocated and placed in the tree at least 18 months prior to being found by four local boys. The investigation was stymied by a complete lack of identification for the deceased. A particularly unsettling element emerged when graffiti started appearing in the region, posing the question that would name the case: "Who put Bella in the wych elm?" Despite decades of inquiry, the true identity of the woman and the person who wrote the taunting messages both remain unsolved.