zurucker, n. — Green’s Dictionary of Slang

zurucker n.

[Ger. zurück, backwards; thus ? detectives follow a line of clues backwards to the perpetrator]

(Aus.) a police trooper.

1947

J. Manifold ‘Ballad of Ned Kelly’ in DSUE (1984) 1372/2: ‘Come out’ that, Ned Kelly’, the head zurucker calls.