Computerized voice with threat of arrest due to "arrest warrant against you."

Message was left. Caller said his name Officer James Anderson with Dept Unit 1 and to call 202-864-1185 that many attempts to contact me and if I don't return the call they would come after me with a warrant and arrest me.

This is exactly he said on my answering machine two days ago. Then I tried to call back on that number but number was disconnected.

Some guy called 5/2/14 from the above number said he is officer Jeff Marshell, he said there is a federal complain against me, he is assigned to the case, we need to meet him ASAP or will be arrested. I hung up, called this number back some answered identifying himself as state investigation officer, In the back ground I heard some one asking some one to meet some in Wall mart parking lot. I hung up. some one tried to call back from 202-459-6029.    

I got also phone message from this phone today. which was look like machine made message with threat. we tried to reach you several times but unable to reach. If you will not call back then legal action will taken against you.
when I tried to call this number ,got outgoing message this phone number is not in service.
I hope some one will take action against this caller whos is threating the people randomley