He doesn't. He is executed after being (wrongly) accused of rape. Atticus defends him as a lawyer.
Atticus Finch asked the sheriff to smarten up, and just shoot the neighbourhood dog which was had mad dog disease. During the trial, he asked "was a doctor called?'
He was the dog. The kids learned that Atticus could shoot.
When a rabid "mad" dog enters town, the sheriff asks Atticus to shoot it. Atticus is a sharpshooter, a skill he does not broadcast.
He shot Tim Johnson, the pet of Maycomb. Tim Johnson is a liver-colored bird dog. Atticus shot him because Tom was acting weirdly and was in the stage of terrorizing the neighborhood and Atticus brought him down with a bullet. (:
Because he has rabies
Sheriff Won't Shoot was created in 1965.
Shoot Low Sheriff was created in 2008.
Sheriff Tate shoots the rabid dog, Tim Johnson, from a distance with a single shot, exhibiting his marksmanship skills. This action saves the town from a potential danger and also demonstrates his calm demeanor and ability to handle difficult situations effectively.
In To Kill a Mockingbird, the crisis where Atticus shoots a rabid dog demonstrates to his children, Scout and Jem, his exceptional marksmanship skills. These skills surprise the children, as Atticus's shooting ability was previously unknown to them.
Atticus calls sheriff Heck Tate because he knows that Heck is the only one skilled enough to shoot the mad dog safely without endangering the community. He trusts Heck's expertise with a gun and knows he can handle the situation effectively.
Heck Tate wants Atticus to shoot the dog because he knows that Atticus is the best shooter in Maycomb and he wants the dog to be put down before it harms anyone. Heck Tate knows that Atticus is the most skilled marksman and can take down the dog with one shot to prevent any danger to the community.
Tim Johnson is a rabid dog who wanders the streets of Maycomb in "To Kill a Mockingbird." Atticus gets involved when he is called upon to shoot the dog because he is known as the best shot in town. Despite his reluctance, he takes the responsibility and shoots Tim Johnson to protect the community from the rabid animal.