From The History of Caldwell and Livingston Counties, Missouri, published in 1886.
KILLING OF ROBERT BRADLEY BT JOHN MARTIN.
February 24, 1869, John Martin shot and killed his step-father, Robert Bradley, at the residence of the latter in Fairview township. It is claimed that Mr. Bradley, on the morning of his death, roughly demanded that his step-son, who was in bed, should get up. A quarrel arose and Martin showed a revolver. Very soon Mr. Bradley walked away from the bed and sat down. Martin was sitting on the bed with the revolver in his hand, when he claimed it was discharged accidentally and the ball struck Mr. Bradley in the back part of the head, killing him instantly. Martin was indicted for murder in the first degree. In August, 1870, he was tried and acquitted, the jury not believing that the killing was intentional.