Let's just clarify
1. The police were searching her home in relation to an investigation into perjury, for which she has now been charged. When police search someones home, if potential evidence is found of other crimes, this is investigated. In this case, the police advised her employer that there may be property belonging to BA. This is not a case of a vendetta.. unless we are suggesting that the police should just ignore possible evidence of other crimes when they search peoples homes.
2. BA have not accused her of stealing the minatures. They have suspended her pending investigation. She will now have an opportunity to explain how the minatures came into her possession and if they are legitimately obtained, or even if BA cannot prove that they were obtained illegally, she will be reinstated. (That is if she is not in prison for perjury).
IMHO, BA would be far better to not allow the purchase of minatures by staff and mark all bottles. That would remove any ambiguity.