I have come across this case before. I was able to locate Fidencia de Parede online and pass the tip on to another website that had a detailed profile of the Doe.
FIdP is still in Dallas, aged 55-60 (i.e., within the Doe age range) and had been contacted. She was unable to explain the loss of her ID card but she isn't the Doe and apparently isn't aware of any connections.
I do like the Hare Krishna theory though - it explains well the callused feet and the shaven head.
there was a group that was actively recruiting in this era called The Christ Family led by "Jesus Christ Lightening Amen" who required members to go without shoes and other worldly possessions.
From what I have been reading from past members, there were a couple of girls who disappeared under suspicious circumstances, and the group as a whole was known to travel all over the country.
Unfortunately, there is not a lot of available documentation (from my searches) to find too much on individuals missing who are thought to have joined cults.
The rule outs from that website are incorrectly stated here...on the website states they have NOT been totally (absolutely) ruled out unless she has a note next to them...example Patricia Otto has NOT been totally ruled out.
A few of you mentioned the cult end of this....I would like any information you have on "The Christ Family" run by Charles McHugh aka Jesus Lighten Amen and if, when, and where they were in southern Minnesota <---this aspect needs to be looked at for no other reason then the followers were made to go barefoot and IMO they were off their rockers.
Also any information on "Into The Light Ministries" run by Rev Ronald Bernier <----did his followers go bare foot? I know they where in the area because the trooper who confessed to the crime joined that group a short time after the murder. Does anyone have info where they stayed when in the area? Did they go barefoot?