What did people in the past do to prove that someone was a witch?

In the past, people used various methods to prove someone was a witch, often relying on superstition and fear. Common practices included the "witch trials," where accused individuals were subjected to tests like the swimming test, where a person would be thrown into water; if they floated, they were deemed guilty. Other indicators included the presence of "witch marks" or the confession of the accused, often obtained through coercion or torture. These methods were largely based on societal panic rather than evidence or reason.