That which is most evident or simple seems to make the most sense at this time, and that the slender woman and car have not been identified yet. as to her car being tampered with, you would NOTE that LE has gone thru that car of hers, and NO foul play was discovered. none.
the car at oreillys, if it was the same car as the cab, that would be something. if it was the same car as what the guy who murdered the woman that same night drives, that would be something. but, thats simple 101 police work, and IF they had those connections it wouldn't take much to put it together.
one.
and, as posted prior (by missdeanor?,) PHONE hasn't been found!? ugh