Well, you address an interesting point. There is a technical
solution, that is some sort of trustworthy addressing scheme that's
independent of prosecutors and so forth. Storing everything scrambled
and then using keys available from the trustworthy agency do decode it
would be one way, but I'm sure there are likely better ways. Beyond
the technology there is the nature of society that itself is
trustworthy. This requires a sociological solution that does not exist
at present, and may never exist in our lifetimes.

With the assasination of Kennedy and our invasion of Vietnam following
the Gulf of Tonkin, the ensuing alienation of young people in that era,
there came a deep distrust of government that has only grown since
then, peaking with Nixon's impeachment and declining only after Clinton
was successfully tarred as a no-count philanderer (with copious help
from Clinton himself!(watch the Phildelphia Story with Katherine
Hepburn, Cary Grant and James Stewart - especially the conversation
Katherine has with her philandering father to see how people in the
1930s truly feel about the subject without the effects of attack
journalism)) and the diefication of the actor Ronald 'raygun' Reagan
(who as President of the Screen Actor's Guild did quite a lot of
philandering himself! lol) In any case, the military's growing control
of the global information environment following Vietnam has becomd
nearly total with the result that it seems quite reasonable to believe
the government might fake information to 'solve' crimes.

This concern can be addressed somewhat by technical cleverness. It
cannot be reversed however without some sort of organizing principle
that permeates all society and changes people's hearts. Sort of like
living in a town where no one locks their doors because the thought of
needing a lock on one's door doesn't even enter anyone's mind. The
moment that is lost, it is difficult or impossible to regain.

So, we are very much on a slipperly slope with no easy way back.

Those who believe we never set foot on the moon would gleefully take
your idea a step further Pat. They'd say we could fake the launching
of a super-duper satellite network and convince everyone such a network
exists. Then, we could use the download center, and image processing
center to fabricate evidence as needed. That would have the same
effect without all the cost.

In many ways we are a culture in decline. Otherwise your suggestion
wouldn't be understandable to most. But it IS EASILY understandable to
all, and that's the point, even if no one buys it.