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
Murders in the Zoo shrieks, and cackling of the wild animals on the screen at the Paramount yesterday were echoed to an amazing degree by the audience, at times driven to a mild state of hysteria by scenes in 'Murders in the Zoo'." However, a "New York Times" movie critic says, "Those who demand their leaven of romance even in horror pictures are likely to find 'Murders in the Zoo' inadequate in this direction." Though he also claims that "it happens that the director has been almost too effective in dramatizing these cheerless events…Lionell Atwill as the insanely jealous husband is almost too convincing