Coroner: Heroin dealers using Cincinnati as a 'test tube'

Authorities suspect the Cincinnati area has been treated as a "test tube" by heroin dealers for use of a powerful animal tranquilizer, a county coroner said on Tuesday.Tests have confirmed carfentanil in the bodies of eight recent overdose casualties, Hamilton County's Dr. Lakshmi Sammarco said, and more cases are suspected. The drug, used to sedate elephants, can be thousands of times stronger than morphine.Sammarco said the sudden surge in overdose cases raised concerns that dealers wanted to