Quackenbush was last seen on July 14, 1981 in Maryland. Quackenbush was a resident of Georgia and was in the Delmar area with her brother visiting her father. On the evening of her disappearance, she planned to go to the bowling alley in Salisbury, MD When her bofriend was not on time, it is alleged that she started walking south on Rt 13. The boyfriend arrived 5 minutes later and left to pick her up. She could not be found, and was reported missing. Foul play is suspected.