Received call from this number today.  He stated that his name was Officer Hudson from the Bureau of Criminal Investigations.  That he was going to arrest one of our employees if we didn't give him certain information.  Asked him what department he worked for and he stated BCI.  Being that I am a retired Law Enforcement Officer (Detective) from that area I advised him that he wasn't an Officer and that we would swear out a complaint against him and have him arrested if he called us again.  That he was with a collection agency and advised him of the Federal Rules concerning collections further that this conversation was being taped.  At that point he hung up.