Waleed Aly slams Port Arthur massacre film maker, page-529

This is from part of the transcript of the court hearing.

"At approximately 10.30 a.m. Bryant arrived at the Midway Point Newsagency and purchased a cigarette lighter from the proprietor, Mr Angelo Kessarios. The owner recognised Bryant because he used to call in at the newsagency on a regular basis approximately 18 months previously. The usual time of his arrival was 6.00 a.m. The proprietor said that he had had, at that time the assumption that Bryant had an early work commitment to be arriving at his shop at such an early hour of the day. But, in fact, Bryant’s real reason for doing so was that he was living in the Copping District, he did not have a driver’s licence and he therefore drove at a time, at that time in an attempt to avoid police detection. When he had been in the shop on previous occasions he would giggle inappropriately but was always outgoing in his manner. But on this occasion the proprietor noticed that his demeanour was quite different. He didn’t pass any pleasantries. He didn’t show any recognition of the proprietor, although they had obviously exchanged conversation on a number of occasions, and he purchased the cigarette lighter leaving more money than was necessary to pay for it and departed quite abruptly."

The shop owner said Bryant was always friendly and outgoing on previous visits to the store. Why did Bryant pretend not to know the owner on this occasion?

During the police interview with Bryant, he said he didn't stop at this store that Sunday. He didn't smoke, why would he buy a lighter? Why didn't he collect his change after the purchase?