snatcher

from WordNet (r) 3.0 (2006)

snatcher
    n 1: a thief who grabs and runs; "a purse snatcher"
    2: someone who unlawfully seizes and detains a victim (usually
       for ransom) [syn: {kidnapper}, {kidnaper}, {abductor},
       {snatcher}]

from The Collaborative International Dictionary of English v.0.48

Snatcher \Snatch"er\, n.
   One who snatches, or takes abruptly.
   [1913 Webster]