On another site I was reading a thread where they were talking about the video. They were talking about how he was swaying back and forth when he was at the counter and how long it took him to count his change to pay for the tea and skittles. Also how he walked the wrong way to leave, walked back over to the refrigerator section then turned around again. It was just kind of odd. They also commented that the clerk seemed nervous. They said he was most likely high at the time in their opinion. They only thing I noticed when I watched it (before I read the thread) was the swaying back and forth and I thought it was odd how he acted after he purchased the items.
It was very sad to see him, knowing not too long after he would be dead. After looking at the autopsy report I was wondering about his tattoos that were noted, who lets their underage kid get tattoos? What establishment would tattoo a kid even with their parents permission? Admittedly, I don't know much about tattoos though.