It wouldn’t amount to murder but there are plenty of RTA offences that cover the conduct that she could be charged with.
The victims are victims. Their willingness to talk to the media, affluence, profession, wealth etc doesn’t make them lesser victims … their children were killed after all.
It isn’t lurid at all to deduce that the Freemantles come from a different or ‘offshore’ tax bracket which means they can afford the best minds to compile the best defence. With that sort of wealth comes power and influence.
Then you have this gross misconduct and suggestion that race played a factor too which isn’t unbelievable given the METs horrendous reputation for being institutionally racist.
Now whether the Freemantle’s used their wealth and power to formulate said defence which the police were deliberate/dumb enough to buy WITHOUT following all reasonable lines of enquiry and therefore cutting corners in the investigation that we won’t know yet.