Looks more like a hatchet to me… one you’d find at Menards or Lowes…  something a serial killer uses…

This is what I had pictured in my mind…

or this…

But Holy Mos Moses, you were right!!  You went all the way back to the FBI Regional Office to dig up that bit of foreshadowing!!  So what now?  Does he hurl it? Brandish it?  No use in bringing a tomahawk to a gunfight, you aren’t going to come out of that in one piece…  Not without maintaining some element of surprise…