S7 Ep 6 Into the night: Where did Nelda Hardwick go?

When Nelda Hardwick disappeared after a late night trip to the store in 1993, there was no real investigation done and it would likely have been forgotten about over time. However, when a mystery woman is killed in the next state over 5 years later the similarities between her and Nelda are noted. Was Nelda the woman who was killed all those years later, and if so where had she been for that time. Or was it someone else all together?

Intro/outro "Sugar Sugar" by Fast Lady