Arrested for Use or Possession of Fake ID? The best practice is to send all samples to the lab.Some departments split the sample. " Kat Cano, a Democrat member of the Tarrant County testing board, called out the precinct number of a test ballot Sept. In this blog, we'll explain what a false positive is on a drug test; how the drug testing process works; what drugs 5panel and 10panel tests detect. Learn how the drug test process works, which drugs 5panel tests and 10panel tests detect, and what can cause false positives. False positives for the presence of fentanyl can occur on drug tests for several reasons, including cross-reactivity with other substances, sample. Groundbreaking research shows faulty field drug tests contribute to 30000 wrongful arrests yearly, disproportionately impacting minorities. The PostConviction prosecutors represent the State of Texas in all appeals from misdemeanor and felony convictions and from juvenile cases in Tarrant County. Groundbreaking research shows faulty field drug tests contribute to 30000 wrongful arrests yearly, disproportionately impacting minorities.