If they had known about her weapon they would probably have taken her into custody or at least confiscated it - unless it was in a locked case and the ammo was in a separate locked container.
New hires have been known to sleep in their cars on the Google campus, shower at the gym and eat for free at one of the numerous restaurants on campus while paying down student debts. She wouldn't have looked that strange to MVPD. A lot of Googlers behave a little bit... abnormal.
Even her parents knew she was going to possibly do something crazy.
Had they had The Baker Act, they could have notified authorities and had her picked up for 48 hours..................
Mountain View is overrun with people sleeping in their cars and its believed many work at Google and other tech companies nearby. Our nearby library parking lot has a car periodically show up filled with junk in the front and back seats — somebody is living in it. The police have an understanding that the person is harmless and they don’t hassle him or her.
Even in Florida, I doubt the police would have had any reason to lock her up under the Baker Act. She wasn’t acting irrationally.