Christian Marte-Martinez was placed into a cell at the Lawrence Police Department headquarters around 1:15 a.m. on Saturday, April 29, the Essex County District Attorney's Office reports.
Police later found Marte-Martinez unresponsive around 5 a.m., the DA's Office said.
Officers began CPR and other life-saving measures before taking Marte-Martinez to the hospital where he was pronounced dead.
No other information was released and the investigation is ongoing.
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