Outside the courthouse, the men walk away. Juror #9 catches up with #8 and asks him his name. #8 calls himself Davis, and the other man introduces himself as McCardle. This reminds us that throughout the entire movie, we've never known the men's names. McCardle says so long and walks away.
Juror #8 (that's Davis) then walks down the courthouse steps and disappears from the screen. And that's a rap. The end. Finito.
Of course, the men came back with a guilty verdict and sent the kid to the electric chair.