Call the news desk of the largest newspaper in the area, and report it. I'm sure they'd love the story & they're required to respect your anonymity.

Or, as several knowledgeable other folks have said, report it anonymously - which one can do- direct to the Dept. of Labor. And soon.

Reporting it to a branch of the folks that are committing the crimes will only give them a chance to cover it up & keep doing it, or do it again down the road.

This isn't a minor infraction - its felony exploitation.

Or refer it to Keith, McGrath or Bobad - I'm sure they have all the answers regarding "Christians"[sic].