“How? They were behind locked doors that he could not access.
So, again, how could he shoot them when he couldn’t get to them.”
I just found an interview from someone who appears to be an employee of the PP facility here: http://www.nbcnews.com/news/us-news/planned-parenthood-victim-kearre-stewart-tried-save-others-n471126
Her interview is about 1/3 of the way down the page. She clearly saw and described the gunman in some detail, and yet, he never turned his gun on her.
She saw him for a few seconds. She saw him shoot “three or four” times before she ran to the back - behind a security door. He was shooting people outside.