Mr. Gilmer is the lawyer accusing Tom Robinson of raping Mayella Ewell. Dill doesn't understand why he's "grilling"
Tom so badly and thinks that it's unfair, but Scout says that it's his job.
His first witness is Heck Tate. The second is Mr. Burris Ewell, and the third is Mayella.
He tries to make the jury believe that Tom Robinson did all those favors for Mayella to get a sexual favor in return.