Killian's son says that She was merely a pool secretary, yet Knox, herself, contends that the memos are forgeris because she didn't type them. The next thingto ascertain is who Killian's personal secrtary was.
Why? He likely didn't have one but just "shared" Knox with others. In that scenario, the idea of him having anyone type CYA notes that could come back to bite his own career is ludicrous -- and the point his son made on Day 1. It would have been professional suicide and no officer would have done it.