"The burden of proof should be placed upon the supplier to establish beyond reasonable doubt that the product being sold is not for human consumption and is safe for its intended use, " its report said.

BBC: Legal highs need more controls, say drug council

According to the source, the purpose of the probe was not to build a case on whether Armstrong or his teammates used banned substances, but rather to establish evidence beyond a reasonable doubt that Armstrong violated criminal fraud statutes.

CNN: January 19, 2013 -- Updated 0035 GMT (0835 HKT)