[B. Lahey]

I am currently doing a bit of legal writing, and need a citation to (preferrably) a professional firearms trainer / expert / law enforcement authority stating that it is acceptable to use deadly force against a person trying to gain control of a person's lawfully carried firearm.

I know police have shot miscreants attempting to disarm them, but a news report isn't the same as a direct statement from a respected individual; for my purposes here, anyway.

It would be best if it was written in a book or training manual, but other methods of publication would be ok if the source is well enough respected.

Thanks!