I just came across another post on the shooting of the reporter and he cameraman in Virginia. Tim, from Gun Nuts Media, posted it and has some interesting information to share.
Some of the language is a little on the harsh side but is appropriate within the context and considering that the author had met Allison Parker personally. His explanation of Task Loading and what it can mean for self-defense is very good.
I strongly encourage you to ready the article, The Grudge, all the way through.