I've bolded the relevant words.
The quote, like a lot from the book, is muddled and confused. But let's say it is so, that would mean Terri walked into the school with Kyron at 8:15, was in the classroom with him until 8:30 (ca), taking the picture and talking to the teacher, then went on tour to the other classrooms, where they were seen by at least one other teacher - then for some reason Terri leaves the school, goes to sit for a while in the truck and then what?
Timewise this just doesn't work. The whole point of the "mystery person" was that they did these things (sitting outside in the truck, moving the truck) while Terri was inside the school. This is half an hour, add the time spent walking to and from the car, while handling a toddler even, and you just can't make both of them fit.
The baby was with Terri the whole time. She was noted in the list given by the police as having been in the school with her that morning. She was seen by a witness just after 9:30 with Terri in a store.
And here we manage to make the scenario even less believable. The only one who has ever claimed Terri said she took the picture at 8:45 is Desiree, and she is also the only one who claims GZ gave that time to the police. This is directly contradicted by GZ herself who gave multiple interviews to the media, and who said she saw Kyron posing before his project at
8:15, not 8:45.
But again, let's entertain this. Terri arrives at 8:15, goes to Kyron's classroom, takes a picture (seen by GZ), leaves at ca 8:30 (another time given by GZ for seeing them in the classroom), tours the school, goes downstairs to meet Kyron's old teacher, leaves Kyron alone in the school, crosses the parking lot, sits in her car, makes a phone call, goes back inside the school, finds Kyron, takes him back to the classroom, has him pose for a new picture, then walks out with him - all of this in 30 minutes?
8:45 never made sense as the time the picture was taken, and the only source for it is Desiree, many years later.
And yet the book has placed Kyron's friend who supposedly saw them together outside, inside the school - even inside the classroom. CL would have no reason to be outside the school after 8:45.
Right, somewhere between 8:15 and 8:30.
And the only source for Terri claiming she parked in the lot is - again - Desiree. The police at the time gave the correct spot -
the shoulder of the road, just before the access road - and never gave any hint she had lied about that.