"On November 7, 2013 the Department received drug testing results for Elizabeth . Elizabeth had tested positive for methamphetamine (at an extremely high level), amphetamine and marijuana. . . . When confronted with the test results, Elizabeth again denied methamphetamine use but confided to the worker she had been sleeping with a neighbor who used methamphetamine and that her positive test may have resulted from those encounters."
I'm pretty sure that's not how it works. So is the Court of Appeal.