I received a voice mail with operator saying to call back regarding a case file. I think it's a SCAM..

Yes it probably is a scam-do not call them back.

This number is a scammer. I didn't answer because I didn't recognize the number. Twice they left a message saying to call back. I just did, and the guy kept asking for my name and number. I told him since he was the one who had called me, he should know it. He said he was Officer Daniel Parker. He had a thick Asian accent. He eventually hung up on me.