How Can I Recognize Trafficking Victims?: "U.S.Department of State Fact Sheets
Because trafficking in persons is usually an 'underground' crime, it can be difficult for law-enforcement personnel, the public, or service providers to readily identify a trafficking victim and/or a trafficking scenario. There have been cases of victims escaping and reporting the situation to the police. However, many are physically unable to leave their work sites without an escort and are not free to contact family, friends, or members of the public."