Ross wrote:AFAIK manslaughter is similar to murder but the difference being the intent was to harm the person, not kill them. I doubt the motorist saw the cyclist and thought "I'll swing the door open now and knock this guy off the bike". The motorist just would of been careless and not looked before opening the door.
You've got the definition wrong there.
http://www.lawhandbook.sa.gov.au/ch10s05s01s02.php
Manslaughter
Like murder, manslaughter requires that:
the victim has died, and
an act of the defendant’s contributed significantly to their death.
However, the final element that is required to establish murder, that is, that the defendant intended to cause death or grievous bodily harm or knew that their actions would result in death or bodily harm, is not present in a case of manslaughter
Various types of manslaughter are applied. Manslaughter can include accidents and seriously negligent behaviour. Culpable driving is essentially vehicular manslaughter, there is rarely any intent to cause harm in these cases.
In cases of manslaughter: there may have been a 'murder' but mitigating circumstances (eg. provocation) reduce the charge to manslaughter; there may have been recklessness or some intent to cause harm (eg. a fight); the death may have been accidental in the course of another
non-violent crime; or the death may have resulted from criminal negligence. Not sure whether this BMW door-swinger's negligence would be regarded as severe enough to be criminal
Does not change the fact that the police should have been applying any relevant road traffic penalty upon her