Vitor has been busted long ago, and recently he tested positive again, he's the only fighter who has been tested recently and failed to not get suspended. Recently UFC decided to drop TRT treatment totally, and Vitor complied.
There was a reason Vitor lives in FL, yet only fights in Brazil. This next fight will be in Las Vegas, where it belongs.
Others that recently got busted was Cung Le, however it's about to be overturned, apparently your HGH levels increase when your getting your head bashed in so the test was unproductive.
Also Wanderlei Silva ran away from testing recently, when he was supposed to fight Sonnen. Sonnen got busted for hmg use, and quit ufc. I have a feeling over 90% of fighters use PEDS, some are just smarter at not getting caught, and staying under the radar.