Two law enforcement agencies in eastern Minnesota are warning residents after a series of overdoses they say may be linked to a potent batch of heroin mixed with other drugs.
As the state of Minnesota ends its investigation into Prince's death without criminal charges, federal authorities say they haven't gotten any credible evidence to support charges either.
Prosecutors have charged a woman with third-degree murder for allegedly providing a fatal dose of heroin to another inmate while they were in the Hennepin County Jail.
A man from northern Minnesota's Iron Range has been sentenced to more than 10 years in prison for giving his girlfriend a fatal dose of a synthetic drug.
State public safety officials say a batch of heroin possibly laced with other narcotics has apparently caused at least seven overdose deaths in Minnesota in recent weeks.