The character you're likely thinking of is Bob Ewell. He is the antagonist of the novel, a racist and vindictive man who is the father of Mayella Ewell, the young woman who falsely accuses Tom Robinson of rape. Bob Ewell is driven by a deep-seated hatred of black people and is determined to get revenge on Tom Robinson and Atticus Finch, who defends him in court.
It is possible you have confused the name "Robert E. Lee" with the common name "Bob."