14 Year Old Laureen Rahn vanishes.  Her mom is haunted by mysterious phone calls.  And a convicted serial killer in the area at the time of her disappearance make this story even creepier.  

http://charleyproject.org/case/laureen-ann-rahn

http://charleyproject.org/case/denise-ann-daneault

https://en.wikipedia.org/wiki/Terry_Peder_Rasmussen