The Heavyweight Champion of EliteXC(Elite Xtreme Combat), Antonio Silva Jr., tested positive for boldenone(a veterinary anabolic steroid prescribed to horses).
He was suspended a year and fined $250,000 by the California State Athletic Commission. He has appealed the findings. Though I imagine it's going to be difficult to prove that you accidentally took a horse steroid.
Not only is he a cheater, but he's stupid. According to the wiki article on boldenone:
It has a very long half-life, and can show up on a steroid test for up to 1.5 years, due to the long undecylenate ester attached to the parent steroid.
One and a half years?!?! Seriously man, you need to switch to something that clears the system much MUCH quicker than that.
EliteXC is the MMA organization that has a deal with CBS and Showtime. This positive test is related to the last CBS show which aired live on prime time on Saturday July 26th which was a much against Justin Eilers to crown the first EliteXC Heavyweight Champion. In California the athletic commission does not have the power to retroactively change a match result due to a positive test. There is legislation in California slowly working it's way to approval that would give the state athletic commission that power.
So for now, Antonio Silva Jr won the heavyweight title and now will take a year off.
As of right now, he is still listed as the EliteXC Heavyweight Champion on the organization's website. Strip him now, seriously.