If they were killed by a shark or crocodile … if that happened the boat would have been found,

A man would tell her how much (marijuana) to leave in the room,

Unfortunately Brad was there also but he could not be spared because he would be a witness to the murder of his father.

… knowing that Cathy was not going to leave Bevin for the sake of the children, he decided to kill him at the shark net,

I always get what I want.

Having killed both males he needed his mother to drive the boat a considerable distance from the scene and … dispose of the bodies,