I just contacted Chuck Jones to suggest that he look at
Elisabeth Martinson as a possible match to Valentine Sally.
The National Missing and Unidentified Persons System (NamUs)
There is no photo available of Elisabeth, but there was enough there that she might be worth a look.
She had blonde hair, and just like Valentine Sally, was described as very pretty.
Her height (5'5") matches.
Her DLC is only about three weeks prior to Valentine Sally's discovery.
The negatives are that her age (22) is a little above the range, and her hair is described as short. But nevertheless, he agrees that she might be worth a look.
He also speculating that Valentine Sally might have been murdered by her father, and for obvious reasons, he would not report her missing. If he was a Trucker/single father, and driving her around the country, this case would never be solved unless a mother or sibling decided to come forward. If she had no siblings and there was no mother in her life, there would be nobody to come forward.
Regarding Norma Jean Halford, he says that there is very little he can do with this because they have neither DNA nor dentals on her, and he can't make Colorado LE go out and hunt down the family members.