The 23-year-old said his positive test was "caused by my inadvertent consumption of food that I did not realize had been baked with marijuana" before he left for the Olympics.
In his statement, he said
I apologize to U.S. Olympic Committee, to my teammates, and to my fans, and I am embarrassed by this mistake. I look forward to representing my country in the future, and will rededicate myself to being the best judo athlete that I can be.Read more (US judoka expelled from Olympics for doping)
You can remember the American making this move during his match against Belgium's Dirk van Tichelt.