This is a spoofed number on a tie-line, using a caller Id for a highly respected DC law firm, Wilkinson Barker Knauer. It is not unusual for the scammers to do this, I.e., steal someone else's identity. Several months ago, another scammer used the number for an equally respected local veterinary practice, which stopped after several weeks of raising h... with Verizon resulted in the scammers being shut down.