Legal Question in Consumer Law in Maryland

No legitimate attorney should threaten arrest for failure to pay a bill. It sounds like a phone call from an overly aggressive debt collector.

You may wish to take a look at a federal law called the Fair Debt Collection Practices Act (FDCPA) which both prevents abusive collection tactics and also prohibits people from posing as a court, attorney, etc. when they are not.

It is a good idea to log such calls, including the date, time & phone number. Federal law offers the right to commence a lawsuit and recover money for each abusive call that violates the FDCPA.