Chicago authorities say a particularly potent strain of heroin and free samples may be to blame for the spike in overdose deaths

** EMBARGOED UNTIL 1400 GMT, MONDAY, AUG. 27, 2007, FOR STORY SLUGGED AFGHAN OPIUM EXPLOSION BY FISNIK ABRASHI ** A drug addict holds a syringe in his hand after pushing heroin in his veins in Kabul, Afghanistan, Sunday Aug. 26, 2007. Afghanistan's production of opium poppy has exploded and broke all previous records for the second straight year, with the multibillion dollar trade now fueled by Taliban militants and corrupt officials in President Hamid Karzai's government. (AP Photo/Saurabh Das)

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When a series of heroin overdoses struck the Southside, the Chicago Police Department launched an investigation into the cases.

Recently, they began questioning a woman believed to be linked to the incidents.

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Supt. Eddie Johnson did not release the name of the woman because she has not been charged with a crime, but according to DNAinfo, police suspect she has something to do with the many overdoses.

Monday morning, Johnson said the woman was taken into custody after an undercover investigation into the series of deaths led them to believe the overdoses may be linked.

As of now, it is believed someone is handing out free samples – the key factor linking together the overdose cases.

With eight overdoses occurring on Saturday alone, police suspect the strain of heroin being distributed is particularly dangerous.

Some locals will not let the matter die in vain, however:

Community activist Andrew Holmes, for example, says he may know where the heroin is coming from and began passing out flyers asking residents to keep an eye out for the man he believes is dealing the dangerous batch.

RELATED: Time-lapse map shows the drug related police reports in Chicago and how things have changed in recent years

If you have information on these incidents, contact your local authorities or dial 911 immediately.

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