I have a feeling that truck was in the left hand turn lane (left from St. Landry on to University) and while waiting for the light to turn green saw her coming towards him. He makes the left turn onto University and then turns left again into the LUS parking lot gets back on St. Landry and begins to follow her to a more remote area. Probably why the truck is caught on camera twice in that location.
I agree with your thinking. I was also thinking he could have made a left on university and taken a right onto Versailles and right onto st John, crossing university to st Landry right behind her. Also if he took a L on university and sharp right right after the insurance company on west convent st, it cuts to st John.
I don't know if the pics are in order by timing. I was thinking possibly this is the best shot of the truck.... But now they are saying this isn't the exact truck.
I'm praying!