Keep in mind that, just because your phone indicates it received a call from a particular number, it doesn't actually mean the call CAME from that number. You may unintentionally be one of many people who is harassing the true owner of that number.
My rule of thumb--if I don't recognize the number, I don't answer. Only if they leave a message to let me know who they are and I want to talk to them, do I call back.
Just received a phone call from Rose DeMello , Dept of Legal Affairs??? She states they have issued a lawsuit against me on behalf of the US Treasury. Please call her supervisor Derrick Williams back at this phone #. This is a scam!
Just received a call from somebody stating they are from the department of legal affairs in Washington, DC and that I was being sued and I needed to call Derick Williams at 213-375-0942 within one hour or they would re-file the lawsuit. Asked if they could send me something in writing, said I had to call. Asked why Derick Williams could not contact me himself, was told he is a very busy man. When I googled the number found several other comments indicating a scam.