Otto Warmbier , the former University of Virginia student who returned home to the U.S. last week after spending more than a year imprisoned in North Korea, died on Monday afternoon surrounded by his family.

Unfortunately, the awful torturous mistreatment our son received at the hands of the North Koreans ensured that no other outcome was possible beyond the sad one we experienced today, his parents said in a statement.

Warmbier landed in the U.S. on June 13 unable to speak, see or react to verbal commands, the statement added. Doctors at the University of Cincinnati Medical Center characterized his state as one of unresponsive wakefulness , they said on Thursday.

Although we would never hear his voice again, within a day the countenance of his face changed he was at peace, his parents said. He was home and we believe he could sense that.

North Korea also sent MRI images of Warmbiers brain, dated April 2016. The photos indicated his injury likely occurred before the scans were taken meaning he had been suffering since the beginning of his imprisonment.