Director Larry Lindenman says undercover officers purchased higher-purity heroin from the house three times. Two men were taken into custody, but no charges have been filed.
Lake County coroner Richard Keller says the county has had 20 heroin overdose deaths in 2009. That's the same number reported in all of 2008.
Keller says the increase is due to higher-purity heroin that some authorities believe is linked to Mexican drug cartels.
