I thought I read that she was with a male both times....So it sounds like the 1st time she received a ride & got dropped off...She was then walking around I-45....That's the Texas Killing Fields serial killer (among others) hunting/stalking grounds...It's unclear if she received another ride from the male...
So she was going to see a friend at the Ellis Unit...Then what....Was she trying to help one of the inmates working on the prison farm escape or was someone getting released?? Maybe she was planning to visit a friend and was attacked before she made it to the Ellis Unit...
WIKIPEDIA
According to the first witness, the girl—appearing somewhat disheveled
[6]—had arrived at the South End Gulf station at approximately 6:30 p.m. on October 31. At this location, she had exited a blue 1973 or 1974 model
Chevrolet Caprice with a light-colored top, which had been driven by a white male.
[20][15] This witness stated the girl had asked for directions to the
Texas Department of Corrections Ellis Prison Farm.
[10][23] After receiving directions, the girl had left the Gulf station on foot, and was later seen walking north on Sam Houston Avenue.
[6][n 3]
This same girl was later seen at the Hitch 'n' Post truck stop alongside
Interstate 45,
[23]where she again requested directions to the Texas Department of Corrections Ellis Prison Farm, claiming "a friend" was waiting for her at this location.
[24] In response, a waitress drew a map providing directions to the prison farm which she then handed to the girl.
[15]This waitress informed investigators that she had suspected the girl was a runaway, and that in their brief conversation, the girl had informed her she was from either
Rockport or
Aransas Pass, Texas. The girl had also claimed to this waitress that she was 19 years old; when the waitress had expressed doubts as to her claimed age and further asked if her parents knew her whereabouts, this girl had reportedly replied, "Who cares?"
[25][n 4]