Now we know how he got his 4 year sentence shaved down to 15 months. https://www.express.co.uk/sport/ufc/1022693/Jon-Jones-agent-denies-Bones-is-snitch-USADA "Jones' punishment by USADA was originally set to be four-years, though it was reduced by 30 months due to the fact that he triggered article 10.6.1.1 of the UFC anti-doping policy." “There are two avenues in 10.6.1 of the UFC Anti-Doping Policy which allow for a reduction in sanctions: 1) an individual can get a sanction reduction if he or she provides information that results in USADA or another anti-doping agency bringing forward an Anti-Doping Policy Violation against other athletes or support personnel," “And/or 2) a reduction can be given if the information results in a criminal or disciplinary body bringing forward a criminal offense against individuals."