A bit of chemical warfare in Cincinnati

An overdose crisis in Cincinnati for the past six days has left police and emergency responders drained, and for now, without clues. It has also underscored that the region does not have the resources to treat all of the addicted.
Police are asking for the public's help in identifying the source of purported heroin sold to people in Cincinnati, mostly on the West Side, that caused scores of overdoses, including at least three deaths.
"We're working very closely to find the source dealer," said Newtown Police Chief Tom Synan, who heads the law enforcement task force for the Hamilton County Heroin Coalition. He said local, state and federal authorities are combining their forces to investigate the source or sources. "We don't have anything solid to go off of."
With an estimated 78 overdoses Tuesday and Wednesday alone, and an estimated 174 overdose cases in emergency rooms in less than a week, officials are scrambling to attack a heroin crisis of a magnitude they've never had before.

My hometown of Fresno has meth hotspots, houses where someone has access to high quality meth.  When a hot spot shows up, the crime rate jumps in town.