Burke and Hare murders doctors, the Burkes and Hares were charged with murder. As part of his investigation Christison interviewed Knox, who asserted that Burke and Hare had watched poor lodging houses in Edinburgh and purchased bodies before anyone claimed them for burial. Christison thought Knox was "deficient in principle and heart", but did not think he had broken the law. Although the police were sure murder had taken place, and that at least one of the four was guilty, they were uncertain whether they could secure a conviction. Police also suspected there had been other murders committed, but the lack of bodies hampered
Villisca axe murders private investigator wrote back to Reverend Kelly, asking for details that the minister might know about the murders. Kelly replied with great detail, claiming to have heard sounds and possibly witnessed the murders. His known mental illness made authorities question whether he knew the details because of having committed the murders or was imagining his account. In 1914, two years after the murders, Kelly was arrested for sending obscene material through the mail (he was sexually harassing a woman who applied for a job as his secretary). He was sent to St. Elizabeth’s Hospital, the national mental hospital in Washington,