Harry potter trivia says An Auror is a person that is trained to catch Dark wizards. then who is a dark wizard or wizards?
Ron became an Auror as well, while Hermione worked her way up in the Deptartment of Magical Law Enforcement. “Harry and Ron utterly revolutionized the Auror Department at the Ministry of Magic. They are now the experts.
An Auror was a wizard or witch who acted as a highly trained law enforcement official for magical governments. Auror training was extremely difficult and intensive, so there were few qualified applicants. Aurors of different countries dealt with different high-risk situations that were most prominent to them. Their training and areas of responsibility varied greatly depending on the type of threats for which they were prepared, and the magical education they received beforehand. In Britain, for example, the Aurors were trained to investigate crimes related to the Dark Arts, and to apprehend or detain dark wizards and witches. As a result, they were often called “Dark Wizard catchers.