Is this an internal police internal investigation memo?

Memo, however, because it is not the same sort of investigative document routinely generated in relatively soon after the event in question. Cf. Anderson v. Marsh, 312 F.R.D. 584, 593 (E.D. Cal. 2015) (noting in the context of a work-product analysis that police department internal investigations are routinely created, and their purpose "is to determine if the officer was legally justified in shooting, complied with departmental policy, and if any action should be taken by the immediate supervisor").