This question is built on top of another questions asked in this site (not all by me).
Based of these premises:
1) Kamma is not the only phenomena/process responsible for the current condition of beings. There are other processes apart from those borned from anthropologic interactions or from any kind of will/intention (e.g. weather conditions, geological events, biological diseases, etc.), which can affect our lives and states.
2) I heard from one user that ghost and other 'paranormal' entities (let's assume for a moment that they exist, and let's just consider what the suttas tell us) can control other's minds. And even if is not "the person itself" the one doing an action, the kamma will be ripen for that person eventually (and I insist, even if that person didn't have the intention of doing an unwholesome deed)
And the question: for those who believe in literal rebirth (i.e. the continuation of certain mind states and kammic seeds from one life to another after the break up of the body), what do you think it happens after biological death to those whose brains begin to malfunction as a product of some biological conditions or fortuitous event, such as a tumour, dementia or a lightning striking on someones head? What if those persons begin acting impulsively and heedlessly, even if before those misfortunes they had completely normal -or even wise- behavior? Will they rebirth in hell or something like that?
Thanks in beforehand for your time and patience!