A little back story.  A friend of ours lived with his parents in an apartment downstairs.  He eventually moved upstairs with my sister.  Every morning at about 5:40 am he would go downstairs and eat breakfast in his parent’s apartment before going off to work. 

This would go on for several years until his unexpected death.  Soon afterwards we received the calls.  They went on for about three days.  Each call was at 5:40 am.  The calls consisted of static and faint breathing.  After a few seconds the party on the other end would terminate the call. 

This was of course, after the advent of call return, so we hit *69 to trace the call.  The phone number of the call was immediately familiar to us.  This was the number of his parents downstairs. 

Could this have been a prank?  This was right after the funeral, so I seriously doubt his parents would do such a thing.  We did tell them about the incident and they swore they were both asleep.