Originally Posted by M48scout
The fact that the shooter seems to have escaped, at least initially, without being immediately captured indicates he has had some help. Either that, or he’s a really really good planner. In today’s world of video camera, cell phones, and thousands of people looking at roof tops, windows, exit doors, etc after hearing a shot, it’s almost preposterous to think of someone escaping the area

There were thousands of people leaving the area. They could have very easily blended in with the masses. But you would think that inside the buildings would have plenty of cameras you are right.