SUING OVER A DISCRIMINATORY HAIR TEST

  BOSTON — Keri Hogan was nearing her dream of becoming a Boston police officer when a drug test using a sample of her hair came back positive for cocaine.
   Hogan and a group of black officers who lost their jobs or were disciplined sued the city in 2005, claiming its hair test is discriminatory because black people’s hair is more susceptible to false positives.
  More than a decade later, the case that could have big implications for the practice of hair testing is heading to trial. The bench trial starts Monday.