410 Gone - Will they ever come back?

Using the WC1 screening process, we create cases with results. When we use existing case Ids, sometimes the results get "dropped off" and we get an API response of 410 (Gone). We are looking to no longer make the API requests for results that have been deemed Gone, but want to make sure they will not come back?

Example: I screen "Putin" today and get 10 results tied to CaseId 1. A month from now, I screen using the same CaseId and the summary still has the same 10 results, but now there are only 9 detail records available… one of the detail records comes back with 410. We'd like to no longer call for that detailed record, but need to make sure it won't "come back".