I know that in some situations, if a man kills a woman it's seen as automatically murder, because the women were passive, helpless and dependent on the man to protect them. But IMO, women aren't necessarily like that anymore, they're moving into their own personhood, which is a good thing. But I think it means they can't always be seen, legally, as child-like and dependent on the kindness of strangers.
There have been situations that were reversed, where a dominant woman killed a passive man during sex, and hid his body.
Dominatrix acquitted of manslaughter - The Boston Globe. Or if gay man kills another during rough sex, he might be a serial killer, or it might have been an accident. You can't prejudge, you have to look at the evidence.
I don't know what the outcome of this case will be, but I think if women want equality, and to take charge of their own (sex) lives, that means giving up this idea that men must always take care of us, that they are automatically murderers if they don't.