I think that's what it would take me to change my mind at the moment. That's the crucial thing to this case and the reason she is on trial, nobody else had the opportunity (according to the prosecution). The defence are doing a hideous job, or they simple don't have much of a defence to work with.
But it's not how the system works either, look at Ian Huntley and the reason why they allow local police force information on dbs checks, it's not always a case of innocent if not convicted, there may not be enough evidence etc... And the verdi t is not guilty but doesn't mean innocent either.