Shortly after his sentencing in March 2016, Warmbier suffered a severe neurological injury from an unconfirmed cause and fell into a coma, which lasted over a year. North Korean authorities did not disclose his medical condition until June 2017, when they announced he had fallen into a coma as a result of botulism and a sleeping pill. He was freed later that month, still in a comatose state after 17 months in captivity. He was repatriated to the United States and arrived in Cincinnati, Ohio on June 13, 2017. He was taken to University of Cincinnati Medical Center for immediate evaluation and treatment.