plastic. it turns out to be bath salts. a chemically produced synthetic stimulant that mimics meth. >> it's an analog of meth alone, which is a scheduled controlled substance. so this can be treated as a scheduled controlled substance. >> and it came from the country that according to the dea is manufacturing and shipping most of the synthetic drugs worldwide. >> from china, mainland china. >> it's no secret to law enforcement where it comes from. and it's no secret to drug dealers seeking to become entrepreneurs in the new world of designer drugs. >> any laboratory in china, if you send them what's called a cast number, a number to every substance that exists, as long