All we are given is what a verified insider says. That being said, an inside provider should be able to provide links as to the two other vehicles seen leaving that parking garage have been cleared. It seems LE would have said from the beginning they were security vehicles and they have been cleared. Plus Christina's mother should have been able to identify them as security vehicles as she saw the tape and said she couldn't identify any of the vehicles because the tapes were so grainy.
And, while we are on the subject, just because they're security vehicles they automatically get a free pass on possibly having Christina in their vehicles. Maybe they offered her a ride and she accepted. There are good cops and there are bad cops.
I don't see Texas asking for information, she is simply posting information from valid links in the case.