You can either look at the sequence of events and accept, with a reasonably high degree of confidence, that a DARPA project was laundered into the mainstream. Or you can accept the fairy tale that Zuckerberg and his friends wrote almost infinitely scalable code over a few weekends and then got lucky…
The procedures were developed by Michael Woods in early 2001, after the FBI had submitted unverified material to the FISC on a few occasions and had gotten spanked.
As Mueller did not become Director of the FBI until September 2001, the genesis of the Woods procedures pre-dates the commencement of Mueller’s tenure; although the bedding in of Woods, and the majority of history to date, took place under Mueller’s leadership.