Prosecutors say a bag of drugs recovered from a toilet at a Massachusetts jail contained fentanyl and not heroin as initially thought.
The Salem News reports that 43-year-old William Cruz, of Lynn, is now facing a charge of trafficking fentanyl-based on the state crime lab results.
Cruz pleaded not guilty Tuesday during his arraignment.
Authorities say they found the roughly one-ounce bag of fentanyl while searching Cruz's cell at the Middleton jail last August.
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Cruz's attorney says his client denies he was "in control" of the drugs, but stopped short of blaming Cruz's cellmate.
Cruz had recently completed a five-year prison term for drug and firearms charges when he was taken into custody on drug possession charges last August.
A judge set bail at $25,000.