Patrolman
From Tardis Wiki, the free Doctor Who reference
A I.E Patrolman was patrolling around a rural farm area owned by Tobias Vaughn. He came across a Lorry Driver (really a UNIT spy) and tried to arrest him because he didn't have a pass, but the Driver said only the police could arrest him, so the Patrolman and the others on patrol shot the Driver and killed him.