no matter how you all argue that the girl may be innocent or whatsoever, accident already happened, innocent life lost, bmw found on the wrong side of the road.

Causing accident while driving on wrong side of the road is already wrong enough. Doesn't matter whether you realized or not realized that you're driving on the wrong side.

BMW definitely at 100% fault here no matter how you twist the scenario. Lagipun not mabuk. if mabuk and langgar still can argue.