Ah, sorry, it was a convoluted story, I dropped some details in between the events. What happened was that after it was towed back home and parked on the driveway which has a decent slop, I could start the car again. I didn't want to risk driving it but also didn't want to leave it out of the garage because rats will at first opportunity get into the engine compartment! I saw rat dropping in there from just that one night outside. So I drove the car back into the garage. But then it stopped runing again. Altogether it run may be 5 mins.

I speculate what happened was that when we loaded the car onto the flatbed tow truck, the car was serious titled front up. When it was parked on the drive way, it was front down. These inclination changes must have sloshed fuels from the sender side to the pump side, allowed me to run it again briefly.

But now the pump side was empty again. Until I put in more gas following CN90 post.

So my question was meant to confirm, when I couldn't start, i.e., no fuel in the pump side, then trying to start the car won't see fuel coming out of bad o-ring. I believe based on all the additional postings here, this is indeed the case.