MONTREAL - An SQ report has shed light on a proposed escape plot aimed at freeing underworld bigwig Raynald Desjardins, according to Montreal's La Presse newspaper.

Desjardins was arrested in December 2011 in connection with the murder of Mafia rival Salvatore Montagna in Charlemagne northeast of Montreal.

The escape caper was to have taken place while Desjardins was being transported from Bordeaux prison to the Joliette courthouse.

Desjardins would have been given handcuff keys and a GPS locator chip, which would have allowed his would-be liberators to follow his prison truck in a minivan and a large truck. 

The truck would then have overtaken the prison vehicle and created a barricade, while the occupants of the minivan were to open fire on the immobilized prison vehicle with an assault rifle, forcing its occupants to open the doors and spring Desjardins.

The escape was never attempted but it was said to be the second such plot to spring Desjardins from behind bars made since November.

Currently at least six members of the SQ now escort Desjardins to his trips to the courthouse, according to Daniel Renaud whose article appeared in Saturday's La Presse.