Okay, then we can both agree that the window of opportunity to get out and really search within a one or two mile radius of her apartment was lost in the very beginning.
This is why I keep harping on it.
I think she drove home and parked her car where it was found.
She then grabbed her keys, locked the car door, and got out with her phone in hand.
What happens next is the big mystery. I suspect she ran over to another apartment right there in her complex, or she got into a vehicle with someone she knew.
Almost 24 hours elapsed before anyone sounded the alarm and began actively looking for her.
I suspect that whatever event made her disappear, happened within the first 1-3 hours after she parked her car.
The person responsible had all night long to rid himself of her, but he really had no way to know that, so I presume it was done within hours.
In a highly congested and urban area like that, the only place you could really dump a body out would be in a park, under a bridge, in water, or on what little shrub land there may be.
This would be done where there is little traffic and at least a small amount of privacy from other motorists.
Another thing I thought of today. She was going to fix dinner for her friend that night. Is there a chance she grabbed a ride with a "friend" and headed to a nearby grocery store ?
If so...........then they've got their video..........and a suspect. (Assuming she made it into the grocery store) Review the video cameras at the nearest grocery stores and convenience stores to her apt.