Looking For Something
The CCTV footage later showed that the two men went up and down the garage before the boys went back to the parking lot. Based on what they were doing, the pair of men had clearly been searching for something. As they poked around and looked for whatever it was, the girl did not leave their side.
Stairwell Entrance
After some time, the two men finally found what they were looking for. It was not a thing but a place. They found the door that led down to a stairwell! The men opened it and brought the girl inside. As soon as they went through it, they shut the door behind them. We are sure that they were up to no good.