He had a 'decoy' distract the guard while he jumped over the fence.
Hunters 'decoyed' the ducks to the pond.
(..) Get out of here! They found Neveu's car abandoned at the train station. And two tickets to Brussels paid for with Langdon's credit card. A decoy, I'm sure. All the same, send an officer to the station. Question all the taxi drivers. I'll put this on the wire. Interpol? We're not sure he's guilty. (..)2006 The Da Vinci Code