Pat Brown says that the PJ claim that evidence of no abductor is that there were "No footprints on the bed one would need to step on to get in or out of the window"

With very little research, she would have found the following images which clearly demonstrate that someone could easily have climbed in and out of the bedroom window without setting foot on the bed:-

The top image shows the direction in which the bedroom window opens.

The bottom image is the inside view of the window which clearly shows how the opening side of the window is not over the bed:-