An abusive boyfriend who stabbed his girlfriend in the neck with a large knife has been shot dead by NSW Police after he charged towards them. Mother-of-four Skye Cruickshank-Walker, 25, suffered severe injuries when her partner Brett Walker, 27, assaulted her in her Nowra home, on the South Coast of NSW, on Saturday. Mother-of-four Skye Cruickshank-Walker, 25, was rushed to …