I don't know if it's ok to answer this as the info comes from the scanner thread.
It appears she never arrived at the house where she was supposed to meet her friend.
I'm surmising she usually picked up her friend and they walked to the park where maybe they met up with others and walked to school?
something may have been different on the morning she went missing as she was witnessed in the 'hood but not within the 3 blocks between her house and the park.
I also thought that it sounded like something about that morning was different simply b/c of the mother's language during her interview changing to present tense regarding the events of Friday morning, indicating she was relating what usually happened on an average day, not necessarily that particular day. not saying the mom had anything to do with anything, just that she omitted at least one thought or memory (maybe coached not to say certain things by LE/FBI) and maybe didn't explain what happened exactly that morning. it sounded like something else happened that she censored herself on, but maybe not related to the disappearance.