A Detective Agency is a business that specializes in investigating various types of cases, such as missing persons, fraud, or infidelity. These agencies employ trained professionals, often called private detectives or investigators, who use various techniques to gather information and solve problems for their clients. Detective agencies can work for individuals, businesses, or even legal professionals. They may conduct background checks, surveillance, or research to uncover facts and evidence. The services provided can vary widely, depending on the agency's focus and the specific needs of the client.