My speculations, keeping what everyone already knows closer to the bottom:
All of the composites suggest that she had one Hispanic parent and one white parent.
I'm not afraid to speculate that she was Catholic, especially if the above is true. She likely has a baptism record in the Corpus Christi Archdiocese archives.
The man she was seeking to visit at Ellis could have been her father, brother or uncle. They did not tell investigators who she was for fear that it might come back and get the mother in trouble somehow. The person she was seeking to visit was likely due to be released around that time. Ellis is not a minimum security prison in any sense. It doesn't seem likely that a boyfriend would have been sent there for a short period of time and was about to be released.
She is likely from the Corpus Christi area. If someone asked me where I was from and I didn't particularly want to tell them, I would probably pick a small town within a one hour drive and give them that, but not my actual city. A former co-worker did just the same thing when asked by suspicious people where he's from. He would give them a small town where no one knew who he was. She could also be from another part of southeastern Texas, such as the San Antonio area.
Her home life could not have been pleasant. Alcohol and/or drug use by one or both parents very likely. Overly strict and religious parenting is another possibility, but not as likely.
WCJD was likely 14 1/2 to 16 1/2 at the time of her murder. Adding in a margin of error, she was likely born between
January 1, 1964 and December 31, 1966.
I began working out an Excel document listing the most common names for females born in Texas from 1964 to 1966. Without anything to compare it to, I had to conclude it wouldn't be even marginally useful. You can still find the Social Security Administration's information
here.
The best chance of finding someone who knew her would be to send out her picture and information to people who graduated from a Corpus Christi area high school from 1982 to 1984, however I'm sure many from the area have already heard about her.