Floyd receives a retroactive exemption for an illegal IV, yet Pac was denied a shot for his shoulder. VADA CATCHES PE CHEATS USADA NEVER CATCHES ANYONE. CARBON ISOTOPE RATIO tests were developed to catch PE cheats. USADA never uses CIR STATING, they say its too expensive, meanwhile the test costs 400.00 VADA is significantly cheaper to use than USADA and they use CIR testing for abnormal T. E. RATIOS. Mayweather's T E. ratios in prior blood tests were found to raise red flags, yet no CIR Tests were ever done by USADA. CIR tests can be done on frozen samples retroactively. make your own conclusions here, but too much money has greased too many palms to stop this level of corruption.