Joseph Demm, age 29, of Hicksville, was arrested around 4:20 p.m., Tuesday, May 25, said the Nassau County Police.
According to Narcotics/Vice Squad detectives, an investigation into a fatal overdose of a Nassau County resident led to the arrest of Demm.
Demm was charged with criminal possession of a controlled substance and criminal sale of a controlled substance.
He will be arraigned on Wednesday, May 26 in Mineola.
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