I really don't think so, as it was a residential area, and if it was a big item, he would have to carry it in his coworker's car and store it at the restaurant till he finished work. There is a gas station near the school though, but I don't think he would've needed to buy something there before meeting the coworker. But it is possible!Do you think the cash he had on him at the time could've been used to make a purchase of some kind on his way to the school?