The Elmo Lassiters of Lowell, AR

I am searching for my father's (Elmo Ray Lassiter) ancestors. I know that his father (William Albert) grew up in Murray, KY and moved to Coke Co., TX. as a young person. He moved his own family to Lowell, AR where my father grew up. My great grandfather was William Riley Lassiter and his parents were Briton and Susannah Lassiter of Callaway Co., KY. I am very interested in finding out about this line of the Lassiter family.