in shadow of a doubt, how does the central villain joseph cotten die?

Hitchcock is obviously the one who inspired the adjective “Hitchcockian” for suspense thrillers. I enjoy playing the audience like a piano. He was nicknamed the “Master of Suspense” for employing a kind of psychological suspense in his films, producing a distinct viewer experience. He would work closely with screenwriters, giving them a series of scenes that he wanted in the films, thus closely controlling what he considered the most important aspect of the filmmaking process. He continued his career with churning out a number of high-tension films that would soon become all-time classics. Hitchcock was a master of pure cinema who almost never failed to reconcile aesthetics with the demands of the box-office. (although he directed a few movies before) Hitchcock’s big breakthrough came with his silent thriller, The Lodger: A Story of the London Fog ( 1927), which both he and students of the cinema would come to regard as his first “real” work. There, he gained experience in writing, editing, and production management, and was eventually assigned his first film as a director. It was around 1920 when Hitchcock joined the film industry. His suspenseful films won immense popularity and critical acclaim, and many of them are still widely watched and studied today. Widely considered the father of the thriller, he is among the most celebrated, imitated, and beloved directors of all time.

Alfred Hitchcock is one of the most influential figures in the history of cinema.

In shadow of a doubt, how does the central villain joseph cotten die?