Firstly, I agree with your comments on Maxine Carr, B00..... There was never any question of her having a hand in the murder of those poor girls, and her involvement, however reprehensible, was 'after the fact'.
Secondly, as I cannot believe my partner capable of murder, of any sort, I think, in the first instance, my inclination may be to lie, to provide an alibi, etc.........
However, as that is unlikely to be the end of the matter, I think that if the evidence seemed to be stacking up against my partner, I would have to give voice to my concerns....