The timing of the three girls seeing someone they thought could be the Z and the time of attack, is too far off I think ?
We can't hang our hats on these three girls seeing the Z, because we know that the killer who parked his car at the scene could not have been in a Chevy, by the width of the tires.
We need to look for a smaller car, perhaps a light golden brown/ tan Comet ? Or a small blue VW ?
It would be a lot easier to find where and when the Mikado was playing down south, than a part time shoe salesman with out a face.
Cecilia's roommate is very nice , she remembers a lot about her and how much she loved Bryan . Ricardo and I showed her the Lake Berryessa crime scene area, it was the first time she had been there. MuterO from PUC was with us, we all went to PUC that day to see the memorial plaque for Cecilia. It had been damaged , we were told it would be fixed or replaced with another one. What a beautiful area that was ! The airport behind the school, made me think of the wing walker shoes, and could Z have been working at that airport ?
Could Z have gone to the rummage sale that the couple went to that day and followed them to Lake Berryessa ? Then watched them for a long while before putting on the costume. What sort of car trouble did Bryan have that day ? Was it a coil wire or loose lug nuts on his car ? What ever it was it was easy to fix, because I didn't read that he had to take it to a gagage.