rod, doctors aren't perfect. If what the pathologist suggests doesn't fit with the scene met by the original attending officers are the pathologist's findings accepted without question? Is there no mechanism for double checking?
Also, when attending a death like this surely the original attending officers ask what happened? If the story (fell asleep on the sofa) doesn't fit with what is in front of the officers eyes (tiny sofa) can a person not be taken in for questioning?
In this case it seems like the original officers didn't do their jobs properly (as referenced in the investigative report) but I'm concerned that you seem to be suggesting that even if they had the outcome would have been the same. And it all rests on the opinion of one person (a single pathologist) who, through the simple fact of being human, can make a mistake.
In addition, surely you can see that three internal investigations effectively saying 'move along, nothing to see here' when there was something very wrong is going to give people a very dim view of police in general and at very least appear like a cover up? The reputation of the police force as a whole seriously suffers when things like these happen. I'm from Liverpool and Hillsborough has left a huge mark on the city. Many, many people (and especially football fans) are still hugely distrustful of the police. Not just because of what happened, but most especially because of the cover up, particularly those of us too young to remember the initial incident.
Finally, the women responding here (and many others I imagine) are often responding with an element of personal history of police not taking our fear of (some) men seriously. This one case cannot be taken as a one off incident when so many people have experienced being dismissed. Some cases do gain a high enough profile to actually change the way major public institutions behave. I hope this one is a wake-up call for the police in dealing with the deaths of women alone with a partner who has a history of serious violence against partners.