Source : Webster's Revised Unabridged Dictionary (1913)

Garroter \Gar*rot"er\, n.
   One who seizes a person by the throat from behind, with a
   view to strangle and rob him.

Source : WordNet®

garroter
     n : someone who kills by strangling [syn: {garrotter}, {strangler},
          {throttler}, {choker}]