An ex-Montreal police investigator has pleaded guilty to a charge of gangsterism for selling sensitive information to criminal bikers.

Benoit Roberge entered the plea in a Montreal courtroom this morning.

He also pleaded guilty to breach of trust as he broke down in tears and apologized for his actions.

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Roberge originally faced four charges — one of obstructing justice, one of breach of trust and two related to gangsterism.

Crown and defence attorneys are recommending a sentence of eight years. A judge will hand down the sentence on April 4.

Roberge is a former organized crime investigator who frequently testified as an expert on the Hells Angels at their criminal trials.

He was arrested last October and elected in February to waive his right to a preliminary hearing.

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He retired from the Montreal police in August and had been working briefly as an investigator with the province's tax agency since March 2013 until being fired following his arrest.