Pa, Ky, In, Ne - lon Robert Karr brickwall

Still searching for my ggg grandfather, said to have been born in Kentucky in 1810. His name listed on the marriage register is Lon Robert Karr, married on February 4, 1834 to Tabitha Williams, also born in Kentucky around 1820. They were married in Spencer County, Indiana. Lon was murdered in Indiana by Howell Purdue around 1839 and Tabitha remarried to a Thomas Lang.I've been looking for Lon's parents for 26 years and am getting quite frustrated.Any help would be greatly appreciated.