The officers had not been trained to administer the test, which was provided by a company called Sirchie Acquisitions. The company's Nark II drug field testing kit has been used to wrongfully convict at least 30 people, local media reported in July. False positives included a man's breath mints being read as crack cocaine, a teacher's headache medication testing positive for cocaine and a couple's vitamins testing positive for ecstasy.

In the case of Fincher, the 'meth' discovered on her was nothing more than cotton candy. But even after it was revealed in March 2017 that lab test results showed it was not an illegal drug, she stayed in jail for another whole month before her charges were dropped.