Obviously I'm not/never was an elder, but I agree with Kate. Somethings not right .Did they lose anyone else's?
Ask him to make sure he does not delete the texts. He can tell them what he thinks he did, but that he doesn't want to make up something so important. Do not put it in writing.He already did that once. Should they give him any guff for it during the co visit, he should show the co the text msgs stating that THEY lost his time slips.