Harrassing Phone calls

This idiot had the nerve to call my home phone and threaten me by saying that he knew where I lived. I saved the message and have filed a formal report against him to the police.  Obviously I am in the process of pressing charges...I have no idea who this person is or why he was filling my answering machine with untrue comments about me but I was fortunate in tracing his number and feel confident that justice will prevail!