Montreal's police Brotherhood has come out strongly against the idea of introducing lie detector tests for organized crime investigators.
The force said it is considering whether or not to implement the idea following a series of allegations connecting senior investigators to organized crime.
But the police union says it has several problems with polygraph testsing.
Most importantly: polygraphs aren't 100 percent accurate.
That raises the possibility of a false positive, which could lead to disastrous results on an officer's career.
The Brotherhood points out that polygraphs are only one of many tools used in a criminal investigation and its results aren't admissible in court.
Using them to vet an officer for a sensitive position is therefore unfair.
Police Brotherhood head Yves Francoeur adds that he was disappointed to hear of the proposal through the media and not directly from the force.