A judge is set to decide the fate of Const. Andrew Robson, a Waterloo Regional Police Service officer who has pleaded guilty theft and possession of marijuana.

While Robson pleaded guilty to the charges, he has claimed he was entrapped, and will not be convicted until that claim is resolved.

He was arrested in 2010 following an undercover operation that the Waterloo Region police force has called a test of the officer’s integrity.

During the operation, Robson was given a bag of marijuana by a undercover officer who claimed it was her son’s and said she wanted to turn it over to police.

Robson checked half of the quantity into evidence, but kept the other half for himself and was subsequently charged.

The Crown says the sting was legal and reasonable, but Robson’s lawyers have argued that the sting was an abuse of power.

The defence argues investigators should have first considered the issues their client was dealing with.

However, the Crown says Robson was offered counselling and police had been told by another officer he was using marijuana.

Robson could be given jail time or go free, depending on whether the judge agrees with his entrapment claims.

The judge is expected to hand down a decision on Dec. 4, and the Crown has said it will seek jail time if the conviction goes ahead.