OK, this morning in the office at work there is a voice message for me on the recorder. It is from a guy a know and was somewhat friends with more than a decade ago. In fact, it has been 12 years since I have heard from this guy. I stopped hanging around with this guy and his crowd a long time ago because of his questionable character and troublesome ways. Well anyway the message at work said "Hi XXXX this is XXXX, I haven't heard from you in a while, give me a call". He leaves his number and contact information. Now one of the reasons this guy hasn't heard from me or anyone else in a while is because he has been in prison for the last 5 years for stabbing a guy in a bar fight. I want NOTHING to do with this guy. Any suggestions on how to go about keeping this guy away from my family and me?