Why have you decided who has or hasn't been tested? Just because you're not watching him fill the cup personally doesn't mean anything.
USADA's website lists athletes who they've tested:
http://www.usada.org/athlete-test-history
. Trefah's been tested twice in 2011 and 2010, and once in 2009. Note that the site does not give say when the tests were given (in or out of competition). Also, it only includes certain test results:
"This search includes all in- and out-of-competition tests on U.S. athletes conducted under USADA's testing program. This search will also includes tests conducted on U.S. athletes training internationally by other testing entities when the request for the test was made by USADA. This search will not yield results conducted on U.S. athletes by other testing entities, if the test was not requested or initiated by USADA, or tests conducted by USADA at the request of other sport organizations or international federations."
The IAAF give the results for the tests that it conducts:
http://iaaf.org/antidoping/statistics/index.html
. It too does not list every test given--only the tests that the IAAF does for itself; the IAAF conducts tests for countries that don't have their own anti-doping system, but does not post those test results. I think these are only from World Champs, the Olympics, meets on the Euro circuit, etc. Trafeh's not listed here, but that's probably because he didn't run a race where the IAAF conducted testing.
The WADA website is impossible, but I don't think they post test results:
http://www.wada-ama.org/
.
USATF posts quarterly negative test results:
http://www.usatf.org/About/Anti-Doping/Testing-Results.aspx
. It's not particularly useful, but it's better than nothing. These results may be the same as what the USADA reports.
You may now return to making cheap-shot insinuations like usual....