According to NSAC Executive Director Keith Kizer, a complaint has been filed alleging that UFC veteran Thiago Silva's drug test sample from his UFC 125 battle with Brandon Vera was inconsistent with human urine. The complaint below outlines the allegations against Silva:

4. On January 1, 2011, SILVA participated in a mixed martial arts contest in Las Vegas, Nevada, which he won by unanimous decision (the "Contest"). The Contest was conducted under the direction of the Commission.

5. Immediately before the Contest, on the same date, SILVA voluntarily submitted to urinalysis (the "Urinalysis") and submitted a specimen for testing.

6. SILVA signed the Forensic Drug Testing Custody and Control Form, wherein he certified as follows: "I certify that I provided my specimen to the collector; that I have not adulterated it in any manner; each specimen bottle used was sealed with a tamper-evident seal in my presence; and that the information and numbers provided on this form and on the label affixed to each specimen bottle is correct."

7. The Urinalysis reflects a Complete-Invalid Result indicating that the specimen submitted by SILVA is inconsistent with human urine. The results of the Urinalysis are reflected in the Toxicology Report, attached hereto as Exhibit 1.

8. The specimen submitted by SIVLA was also tested by the Sports Medicine Research & Testing Laboratory, which is accredited by the World Anti-Doping Agency.

9. The Test Report from the Sports Medicine Research & Testing Laboratory reflects that the specimen submitted by SILVA is inconsistent with human urine. The Test Report is attached hereto as Exhibit 2.

10. SILVA submitted an adulterated and/or substituted specimen for testing for the Urinalysis.

What are your odds on? The Whizzinator? Masking agents? The combination of a dead man's urine and the Whizzinator? The rumor mill has been quite crafty in their speculation, but the real question is how a fighter was able to take a drug test without being caught. 

According to Josh Gross via Twitter, Kizer told Gross that Silva did not test positive for a masking agent. A synthetic urine was used in place of his own urine to fool the drug test. 

Kizer noted that the original sample was flagged, thus requiring the B sample to be re-tested. The commission's suspicions were confirmed through the additional testing that the sample as a whole was inconsistent with human urine. Silva is now suspended until the April 7th hearing in which he will be up for suspension and fine in accordance to the NSAC by-laws. Kizer has stated that he will ask the NSAC to overturn the UFC 125 decision against Brandon Vera to a no-contest.