[CGamesPlay]

IANAL, but as I understood, this exception is specifically about cases where precedence is established. This same trick or others substantially like it won't work in the future, but because it was not a "known trick", the conviction still stands.

[K0balt]

Not only that, prior to the search another court had ruled that no warrant was required. The new ruling overrides the old one, but the search was in good faith.