What happens when Scout and Jem walk home from the pageant?

In Chapter 28, Jem and Scout are walking home from the Halloween pageant when they hear someone following them. Initially, the children believe Cecil Jacobs is trying to scare them, but then Bob Ewell attacks them. Bob Ewell pulls Jem backward and breaks his arm. Bob then squeezes Scout and attempts to stab her, but she is saved after Boo Radley heroically comes to her defense. Boo Radley wrestles with Bob Ewell and is able to take Bob's weapon. Boo stabs and kills Bob Ewell with his own knife, then picks up Jem to take him home. Scout was unable to witness the attack because of her cumbersome costume and sees the figure of a man staggering down the road holding Jem. Later, it is revealed that Boo Radley saved the children, and Sheriff Tate decides not to tell the community about his heroics.