After a year-long investigation, the Volusia County Sheriff's Office on Monday announced it had busted a fentanyl distribution organization that was mixing a dangerous animal tranquilizer into the drugs it was selling. The animal tranquilizer, xylazine, is known to cause wounds at injection sites that destroy flesh and can lead to the amputation of limbs. Because it is a sedative and not a narcotic, users who overdose on drugs mixed with the drug might not be revived by treatments like Narcan, said sheriff's spokesman Andrew Gant. Operation Empire was carried out by the Volusia Bureau of Investigation and East Volusia...