"I need help. SOS": Australian girl"s last chilling Facebook post before she was struck by car and left fighting for life

April-Lee, 17, on life support after suspected early morning hit-and-run
The teen posted a chilling SOS message online minutes before being hit
Mother Leonie said her family is maintaining a bedside vigil at hospital
A number of witnesses heard a loud bang just before the collision

By
Taylor...
"I need help. SOS": Australian girl"s last chilling Facebook post before she was struck by car and left fighting for life