The Canadian Centre for Ethics in Sport (CCES) opened the investigation after banning the two-time Paralympic gold medallist for four years in April.

It came after he tested positive for the banned anabolic steroid nandrolone in out of competition tests in April and May 2015.

Connor has since admitted to using the performance enhancing drug since May 2012, with the CCES and the International Paralympic Committee (IPC) opting to remove all of his results since.

His national rankings from May 1, 2012, have been wiped out as a consequence, while he has been stripped of his 100 metre national titles from the 2012 and 2013 Canadian Track and Field Championships.

The 39-year-old has also seen his results taken away from all IPC sanctioned events, including the London 2012 Paralympic Games and the 2013 IPC Athletics World Championships.

Connor had missed out on a podium finish in London in the men’s T42 100m final, after finishing in fourth place.

In 2004, he had tested positive for nandrolone and testosterone and received a two-year ban.

As a result, he missed that year's Paralympic Games in Athens and was unable to defend the T42 100m title he won at Sydney 2000.

Connor claimed he had been taking the drugs after being diagnosed with testicular cancer but had not declared them on his doping form.

He then returned to win the T42 100m title again at Beijing 2008.

He was awarded the Laureus World Sportsperson of the Year with a Disability in 2004 but that was revoked following his first positive drugs test.

Connor, who lost his left leg at three months because of a problem with his fibula, was also the Canadian Disabled Athlete of the Year in 1997, 1998 and 1999.