He was born in Sandy Hook, Newtown, in Fairfield County, Connecticut to Denman (or Denmon) and Elizabeth Jane Shepard Blackman.
Years after Blackman's death, he was accused of forging the Bat Creek Inscription of 1889.
[1] Luther Blackman was accused of forging the Bat Creek stone, which was found in a burial mound in 1889.
It was during this time that President Grover Cleveland created the 1883 Pendleton Act to fix the Pensions Claims Office and the Postal Service.
It has been suggested that the L. C. Houk political machine that ran the Republicans in East Tennessee might have had Blackman create the stone to improve the chances to remove John W. Emmert and other Democrats from their positions.