...during his seminars is the survival rate when being attacked goes down considerably when you simply try to run away. I'm hoping someone here can point me at the source for this information"
Hard data? No one has collected this exact, hard data. There is not a checklist on a crime report that documents this situation. The FBI is not tabulating this exact question. The individual stories are really anecdotal. In the absence of the hard data, there is nothing left but best assumptions based on common sense from whatever truth you can find.
Most of that information actually comes from military history and research. Since the days of Alexander the Great is has been noted that you are easier to kill from behind. Military historians have long claimed that more men have been killed from behind than from the front!
Two reasons.
1) You de-personalize yourself when you are not facing the enemy.
2) A hunter-prey mentality comes over the enemy.
Martial arts instructors have too long thrown down the easy line, "Turn and run." It may not be that simple. Every situation is different. You may turn and run...and be chased! That is why the term "Orderly retreat" was invented. This how Alexander the Great had a fraction of then casualties of his enemies. And since, then how smart people train.
Some source material:
An Intimate History of Killing By Joanna Burke.
THIS my friends is the thorough, best study on the subject. 509 pages of stats, cultures, weapons, psychology...you name it. WAY better than...
On Killing by Lt Col Dave Grossman
Grossman has somehow become the poster boy of death for police officers whose first introduction to the subject is through him. I am not a big fan, but the book should be on everyone's "must read" list. My biggest complaint (and MANY others also) is he has a kind of liberal, sociologist's view of the world, leaning toward a non-violent approach to his study. He does not take into consideration the easy violence of say, the teen militia of Sierra Leone or of the Sudan, or even the Marine firing rates in the Pacific in WWII, or today in Iraq! But, ya still gotta read it!
Carnage and Culture, or anything by Dr. Victor Davis Hanson
This guy makes me, Grossman and many others look like pimps in zoot suits. He dissects man-vs. man and unit close quarter battle unlike anyone else. But his sweeping view and giant mind will take you many places you might not want to go. Inside all this he covers the run/disorderly retreat situation.
You are easier to kill from behind. Proven.
There is a strong chance you will be chased. Proven
The two of the above blend together, enforcing each other. Yup.
So, at times, when you turn and run from a criminal or an enemy soldier with a knife? There is a strong chance he will chase. Sometimes he has to prevent your escape, to rob you, to prevent you from screaming for help, etc...
Sometimes you just can't run?
You are the only one under 60 at the Luby's with a crazy man running amok.
You are with your kids.
You have to do something.
Every fight is so situational! So unique and different.
Hock