The wife of a Louisiana police chief, who was charged amid a sweeping federal investigation into an immigration visa fraud scheme, was also arrested on Thursday.

The police chiefs worked with a business owner to help hundreds of people get U visas intended for crime victims.

Federal authorities charged three current and former Louisiana police chiefs with taking money in exchange for filing false police reports, allowing illegal immigrants to seek a visa that will enable crime victims to stay in the United States and prevent them from being deported.