It would be like killing a mockingbird and mockingbirds do not harm anyone or disturb anyone. Boo never disturbed anyone or harmed anybody. If people knew Boo was the one who killed Bob Ewell, then Boo would've got all these attentions and he does not like attentions.
After Atticus understands that Boo Radley, not Jem, killed Bob Ewell, Mr. Tate tells him that he intends to say Bob Ewell fell on his knife to spare Boo from becoming a town celebrity. Scout assures Atticus that Mr. Tate is right by saying that letting Boo become the center of attention of the town would be like shooting a mockingbird.
Bob Ewell died after falling on his own knife during a struggle with Boo Radley while trying to attack Scout and Jem. Mr. Tate concluded that Boo Radley had acted in self-defense, and that it was necessary to protect him from the public scrutiny that would come if he were labeled a hero.
Boo Radley
Heck Tate wants to protect Boo Radley, who killed Bob Ewell, because he believes Boo acted in self-defense to save Scout and Jem. Tate wants to avoid the publicity and attention that would come with Boo being hailed as a hero, recognizing that Boo would not want the attention.
tate knows that Boo Radley killed Bob Ewell!
In Chapter 26 of Harper Lee's "To Kill a Mockingbird," Atticus shares the truth about Mr. Ewell's death to Sheriff Tate, arguing that Bob Ewell fell on his own knife. Tate and Atticus decide to keep the truth hidden to protect Boo Radley from unwanted attention. This secret reveals the lengths to which the characters will go to protect Boo and uphold justice.
In "To Kill a Mockingbird," Heck Tate finds Bob Ewell dead in the woods after Boo Radley intervenes and saves Scout and Jem from being attacked by him. Heck Tate initially tries to cover up Boo Radley's role in the incident to protect him from unwanted attention.
Boo Radley pulled him off Scout, and threw him to the ground, there he fell on his knife. == Sheriff Heck Tate gave a clear demonstration of it: Mr Ewell was careless and drunk, and he tripped and fell on it. But the fact was, although not stated explicitly, Arthur "Boo" Radley stabbed Ewell to protect the children, and Sheriff Tate lied about it (tactfully) to protect Boo from the spotlight. This is made clear when Atticus tells Boo, "Thank you for my children, Arthur."
Heck Tate insisted that Bob Ewell fell on his own knife in Harper Lee's "To Kill a Mockingbird" to protect Boo Radley from being thrust into the public eye and potentially facing legal repercussions. Tate believed that Boo acted in self-defense to save the children, Scout and Jem, from Bob Ewell's attack. By attributing Bob Ewell's death to his own actions, Tate sought to preserve Boo's privacy and prevent him from being hailed as a hero or subjected to unwanted attention.
Frist, the man's name is Sheriff Tate, not Sharon. Second, Sheriff Tate insists that Mr. Ewell fell on his knife in order to keep Boo Radley out of trouble. He knew that if the town heard that Boo Radley intended to kill Mr. Ewell, everyone would insist on prosecuting Boo for the murder. Sheriff Tate did not want to ruin Boo's life since he was protecting Jem and Scout. Also, even though it was self-defense and Boo would have not been convicted, Tate knew that putting him through the trial would infringe on his need for privacy.
Boo Radley killed Bob Ewell because Bob was trying to kill Jem and Scout. At first, Atticus believes Jem did it. Heck Tate insists that they claim Bob Ewell fell on his knife. Atticus thinks Heck is protecting Jem and he does not want to cover up what he thinks happened. When he finally understands that Boo did it he agrees to the lie.
Heck Tate is covering up the truth about Bob Ewell's death to protect Boo Radley, who actually killed Bob in defense of Scout and Jem. Tate believes that revealing Boo's involvement would subject him to unwanted attention and potentially harm his reclusive lifestyle.