Yes. He needs to employ documented legal residents in the belief that they are undocumented "illegal" residents. This is called a sting. The legal lawful docume.Ted employees can document his bad acts and testify against him, after his undocumented worders have been warned to run for the hills. The fake illegals need to be police or journalists or the agents of police or journalists OR they need to be very careful not to commit fraud or identity theft. Exploitive employer might be smart enough to insist his "illegal" workers present a driver's licence or state ID so he has something with which to blackmail them.

OP can call the labor department to ask what to do. Generally the phones are answered by bright young lawyers who care. They are happy to talk your ear off about these issues.