Alonzo Robinson (1895 – March 5, 1935), also known as James H. Coyner, was an American grave robber, murderer, cannibal and suspected serial killer. While living at a house in Ferndale, Michigan, Robinson was suspected of murdering and decapitating 4 women, but there was insufficient evidence to convict him. He was eventually sentenced to death and executed for murdering Mr. and Mrs. Aurelius B. Turner in his hometown of Cleveland.