Yes, I understand that only the people involved in an arrest would have recollection of it.
But that is just the point. A database differs in degree from personal memories (it follows you around), but it is not different in the sense raised by a statement like That seems directly opposed to the presumption of innocence. (a second interaction could be colored by an officer's memory just the way an interaction could be colored by an entry in the database).
In the case of surveillance and databases, a difference of degree is a difference of kind. Having perfect memory stored for all time, accessible to all of a class of people, is not remotely comparable to a few people with fuzzy memories that fade over time.
But that is just the point. A database differs in degree from personal memories (it follows you around), but it is not different in the sense raised by a statement like That seems directly opposed to the presumption of innocence. (a second interaction could be colored by an officer's memory just the way an interaction could be colored by an entry in the database).