Can the employer file a criminal complain with the police?

During the course of a corporate investigation, you find that an employee is committing a federal crime.

Can the employer file a criminal complain with the police?

A.
Yes, and all evidence can be turned over to the police

B.
Yes, but only if you turn the evidence over to a district judge

C.
No, because the investigation was conducted without following standard police procedures

D.
No, because the investigation was conducted without a warrant