“Duty of care” relates to whether or not the situation in question has crossed any legal boundaries in terms of the defendant’s conduct and responsibility. An example of this would be that all drivers have a duty of care to remain sober and follow the laws of the road while driving on a public road. Therefore, if a defendant is found to have been drunk driving, there will be a stronger case for them to be held liable.
A second consideration is whether or not the death would still have occurred if the defendant did not act in such a way, or even if the defendant was not there. If the death likely could have been prevented without the defendant’s behavior/negligence, then the case against may be stronger.