Gilles Mathieu has been a member of the Hells Angels since the late 1970s or early 1980s. He was  a member of the Montreal Chapter, and he  helped  found  the  feared  Nomads  Chapter  in  1995, along  with Maurice Boucher and Louis Roy. Mathieu  also served as Godfather to the Pirates puppet club, headquartered in his home town of Valleyfield.

     Mathieu, who  was  described  as  Boucher’s  second-in-command and close advisor, has kept  a  low profile over  the years. While  Hells Angels  were  being  imprisoned  left  and  right  following  the  1985 slaughter of  five members of the club's North  Chapter, Mathieu  was acquitted of murder  and  being  an  accessory after the fact. Evidence revealed at the trial showed that Mathieu  arrived at the clubhouse only after the bikers were gunned down.
Gilles "Trooper" Mathieu

     Mathieu was  arrested  alongside  fellow  Nomads  Denis "Pas  Fiable" Houle, Gilles "Trooper" Mathieu. Richard "Dick" Mayrand, and  Michel Rose, Nomads  prospects  Luc "Bordel" Bordeleau and Jean-Richard Lariviere, and  Rocker Kenny Bédard  at the  Holiday Inn on  Sherbrooke Street on  February 15, 2001. All eight bikers were armed, and police found photographs of  eight  members of  the Rock Machine/Bandidos biker gang. Police seized the bikers’ pocket money, which totaled $39,197.

     In order to  avoid  gangsterism charges, the  eight  bikers  pleaded guilty  to weapons charges. Mathieu was sentenced to one year in prison.

     Mathieu was among more than 100 Hells Angels  and  associates charged in Opération: Printemps 2001 on  March 28, 2001. At  Mathieu’s  home, police seized  a  large  amount  of  jewellery, a  letter  with   the Canadian rules of the biker gang and  a note to Mathieu from fellow Nomad Walter Stadnick, who referred to Trooper  as “an inspiration”. It was  also later  revealed in court documents  that  Mathieu  owned more than $2 million worth of advertising signboards at the West Edmonton Mall.

     In September, 2003, Mathieu  and  eight others  pleading  guilty  to  charges of  conspiracy  to commit murder, drug trafficking, and gangsterism. Had they not pleaded guilty, it was estimated that approximately 200 witnesses would have been summoned to testify, costing taxpayers several million dollars.

     The crown prosecutor  alleged that  Mathieu was part of  a  massive criminal organization  that  reaped $111 million from drug sales per year. The court was asked to impose 20-year sentences on  Mathieu  and other  Nomads members  Normand Robitaille, Rene Charlebois  and Denis Houle. An 18-year sentence was asked for  Nomads prospect Guillaume Serra  and 15-year terms for Rockers members Pierre Provencher, Jean-Guy Bourgoin, Daniel Lanthier and Sylvain Laplante.

     Mathieu’s lawyer said his client  received the  equivalent of  a  maximum  sentence  for  second-degree murder despite the fact there was no proof linking him to any actual murder. “He is now 52, and a 15-year sentence means a lot more to him than to a younger man,” the lawyer was quoted as saying.
Hells Angels Nomads Chapter