Mr. MacMillan, two physicians and Mr. Donohue's brother spoke about the officer's condition during a news conference at Mount Auburn Hospital in Cambridge, Mass.

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According to a recent study by researchers at Auburn University in Alabama, patients in the hospital may get the wrong drug 20% of the time.

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Former player Ladarious Phillips, 20, and Auburn resident Demario Pitts, 20, died later at a hospital, he said.

CNN: Suspect in Auburn killings turns self in