I've always been suspicious of the parking lot stories. I suspect Brenda's truck was moved at some point during the evening -- even Keith Stone said, at closing time, Brenda's truck wasn't in the same spot it was parked earlier -- and I suspect the returning for cigarettes was to cover for anyone saying they saw them going back into the parking lot near closing time.
You just filled in one of the blanks for me, unfortunately there are plenty of other blanks.