Sheriff Wes Tripp said in a statement deputies and City County Drug Task Force agents are looking for these drugs and encourage the public to contact a drug agent or deputy if found.
The heroin was seized within recent weeks, he said.
Tripp said this evening black tar heroin is a form of heroin that is “probably the most dangerous heroin out there. We’re not dismissing any other drug as dangerous, all drugs are dangerous. This one seems to be even more so.
Black tar heroin, according to the National Institute on Drug Abuse is sticky like roofing tar or hard like coal.
A study by the National Center for Biotechnology Information said it is often heavier than regular powdered heroin and usually wrapped in plastic and sealed in tiny balloons for sale.
The NIDA, referenced on the website opium.com, says the form of heroin looks the way it does because of crude processing methods which leave behind impurities.
Those who use black tar heroin, the website says, will usually be people who have been addicted for a while and do note care whether the drug is pure or impure.
Black tar heroin has been known to cause issues such as wound botulism, soft tissue infection and tetanus.