PLYMOUTH, Mass. (AP) — A Massachusetts man was sentenced to serve 10 to 12 years behind bars after admitting to charges that he killed his infant daughter by feeding her opioid-laced formula five years ago.

Thirty-three-year-old Ryan Barry was sentenced Wednesday in Plymouth Superior Court after pleading guilty to a single manslaughter charge.

Barry’s daughter, 5-month-old Mya, was found unresponsive in their Marshfield apartment on Sept. 23, 2011. Rescuers say the baby was cold to the touch and wasn’t breathing upon their arrival.

Prosecutors say police found heroin and hypodermic needles in the bedroom Barry shared with Ashley Cyr, Mya’s mother, and their two other infant children. Officers also found a baby’s bottle containing opioids.

Cyr’s trial begins on Thursday. She has pleaded not guilty to charges of manslaughter and reckless endangerment.

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