Retrospective log disqualification scenarios

There could be a situation where a log distrust action will have to be applied retrospectively. I.e., if it comes to light that a log has been maliciously operating over the last 6 months, I assume SCTs from such a log would have to be retrospectively rejected?

The current policy and the definition of "once qualified" doesn't seem to account for such a scenario. It allows for a SCT to be acceptable as long as the log was qualified at the time of cert issuance.