A Georgia woman spent more than three months in jail on drug charges after sheriff’s deputies mistook congealed cotton candy they found in a car she was riding in for methamphetamine. A state crime lab eventually showed that they were wrong. Now, she’s suing. In the lawsuit, filed this month, Dasha Fincher alleges that she was wrongfully arrested and incarcerated in December 2016, when she and her boyfriend were pulled over by Monroe County sheriff’s deputies. The deputies found a blue, crystal-like substance in a bag on a floorboard in the car and evaluated it using a roadside test kit,...