Dr. Clark Murray: I used tomographic reconstruction of Coonan's wounds to generate a 3D model of the blade used. It's a Special Operations Group knife, the kind favored by Special Forces in Gulf War I. He kills with a single blow, using these other wounds to camouflage the skill with which the initial stroke was delivered. The very same method and the very same weapon that the killer employed ten years ago.
Somewhere in this proof video is a sog Seal2000
https://m.youtube.com/watch?v=PXo08F7yFTg