In 1873, a double murder took place at Smuttynose, the largest of the Islands of the Isles of Shoals. Norwegian immigrants Anethe and Karen Christensen were purportedly the victims of murderer Louis Wagner, a German fisherman who was seen in Portsmouth Harbor earlier that evening. Wagner had previously stayed and worked on the island and reportedly rowed to the island to rob the house. He was convicted of the murders and was hung in 1875. Wagner professed his innocence until his death and the story has since been sensationalized in the press and on film. Although Wagner had no alibi, the conviction was based on circumstantial evidence and several theories about who may have killed the women have emerged over the years.