I agree about the time. There is some missing time between her stopping at Henry's and being caught on the camera at the crosswalk. so she clearly didn't proceed directly from Henry's to the Park. Her and Bowie must have wandered around a little bit first, then headed to the park. As for her not being caught on the camera at the Charles Allen gate, who knows. Perhaps the actual attack occurred a little further in. But that leads me to wonder what was Katie's planned route? Katie was apparently not afraid and often walked late at night. But even I an in shape good sized man would not proceed deep into that park at that time of night.