When she hit the ground with the satisfying thud that Walter had grown to love, he smiled. Before she could get up, Walter was on top of her. Each knee placed at either side of Katherine's hips. He was almost straddling her, and from his position he got a good view of her face. Without a moment of hesitation he grabbed his knife, and placed it directly against Katherine's carotid artery.
"It's almost sad that you're going to die tonight." He said with an amused grin on his face. And he pressed the blade hard against that area.