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 of Oakdale and Forest Hill were among those accused of filing false reports that allowed migrants to apply for visas intended for crime victims.

What if the very officials sworn to enforce the law themselves commit a monstrous fraud? In Louisiana, three serving and former chiefs of police, one city marshal, and a businessman hatched a plot, federal investigators allege,