The Canadian sprinter, who was stripped of his world record and 100 metres gold medal after testing positive at the 1988 Olympic Games, faces a lifetime ban from the sport if the commission is satisfied he took performance-enhancing drugs and has committed a second offence.
Last March Cantona was shown two red cards in four days - one for stamping on a player at Swindon, the other for committing a second bookable offence at Arsenal within two minutes of the first.
They were aggrieved Liverpool's Lucas Leiva was not sent off when he committed a second bookable offence which went unpunished apart from a free-kick with the score still at 1-1 in the second half and feel that they are not getting the rub of the green with refereeing decisions.
That ban was doubled by the IAAF on Friday after the tribunal, chaired by Michael Beloff QC, decided that Sumgong had committed a second anti-doping offence of "tampering with a doping control".
The change, which will be brought in during December, will mean rapists and other criminals who commit a second serious violent or sexual offence will get a mandatory life sentence.
If possible in this situation, though, you should try to warn the defender he will be cautioned after you have played advantage: that might have made him think twice about committing the second offence.
If two parties, neither being a victim, engage in a mutually agreed activity, during which one is committing a criminal offence, the second party is liable to a charge of "aiding and abetting", or conspiracy.
Zimring says that his research shows that youth offenders had a one in 25 probability, or 4% likelihood, of committing a sex offence in the first eight years of adulthood.
