I was thinking the same GherkinsMummy - it would be the most credible escape from a very wrong conclusion.
I am FURIOUS with BASTARD SOC.
This SL was supposed to be sensitively done and in consultation with WA? Bollocks. Typical EE shite, and hugely disrespectful to all women who are being or have ever been in an abusive relationship. Kill or be killed is not the answer. And if it is the answer then statistically it is far more likely that Helen would be dead now, not Rob.
If Rob is dead then, to answer a qn on previous thread, self-defence will be better than diminished responsibility because the former will mean no conviction; the second a conviction for manslaughter.
I'm hoping he is not dead and when the police (not rubbish PC Plod) investigate they uncover a whole history of physical and sexual assaults by Rob and he gets sent down for ever, and Helen escapes with a tap on the wrist.
I wouldn't put it past Rob to be pretending to be dead and to have minor injuries. Although it did sound like H stabbed him once, stopped, then laid in repeatedly.