I don't have a link, but I am pretty sure the car was picked up by GA in the afternoon, and the white trash bag was recovered by LE later that evening around 10ish. I could be wrong. I would think any length of time over a few minutes would allow insects in the dumpster prior to the white trash bag being place there would be sufficient for at least some of the insects to infest the white trash bag.
They know when these flies infested the bag and it wasn't at the Tow yard.
Read Dr Haskell's report again.