First let me premise this by saying this is one of the few witnesses I actually believe. Her body language is consistent with her narrative and there is no weird emotions or obvious signs of deception. Her story is odd because she saw something strange occur prior to he shootings, two boys screaming and then a black car pulled up, before gun shots that were allegedly the shots at the school. Note how she is a neighbor of Georg Rosen. We know this because she lives by the firehouse. Rosen's house is literally feet away from the firehouse, the spot the first responders were set up. Rosen claims he had no idea anything was going on, despite the fire trucks, ambulances, flashing lights, sirens, and multitudes of people. This is very strange.
Now, just to be clear here. This woman sighted some strange things that occurred prior to the school shootings. She saw 2 boys (one on a skateboard), screaming and fleeing. They past the firehouse and a black car pulled up into the firehouse. Then a man came running looking for the kids. So what is going on? Well, the only think I could point out is that it's very doubtful that man was a parent. There's no way that a parent could be notified that quickly. Perhaps the kids were going to school and saw something they should not have seen and then fled. Perhaps the black car and the man was after them. However, I just don't know.