Obituary: Otto Warmbier, American student who died after imprisonment by North Korea

The family of an American college student who died days after being released from North Korea in a coma says the 22-year-old 'has completed his journey home'.

US student Otto Warmbier cries while speaking to reporters in Pyongyang, North Korea in February 2016 (Korean Central News Agency/Korea News Service via AP)

Otto Warmbier died on Monday, relatives said in a statement. They did not cite a specific cause of death.

“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.

Doctors had described Warmbier’s condition as a state of “unresponsive wakefulness” and said he suffered a “severe neurological injury” of unknown cause. He arrived in Ohio on 13 June after being held for more than 17 months.

The University of Virginia student was accused of trying to steal a propaganda banner while visiting with a tour group and was convicted of subversion. He was put before North Korean officials and journalists for a televised “confession”.

“I have made the worst mistake of my life!” he exclaimed, choking up as he begged to be allowed to reunite with his parents and two younger siblings.

He was sentenced in March 2016 to 15 years in prison with hard labour. His family said they were told he had been in a coma since soon after his sentencing.

Doctors said he suffered extensive loss of brain tissue and “profound weakness and contraction” of his muscles, arms and legs. His eyes opened and blinked but without any sign that he understood verbal commands or his surroundings. Unresponsive wakefulness is a new medical term for persistent vegetative state. Patients in this condition who have survived a coma can open their eyes, but they do not respond to commands. People can live in a state of unresponsive wakefulness for many years with the chances of recovery depending on the extent of the brain injury.

North Korea said Warmbier went into a coma after contracting botulism and taking a sleeping pill. Doctors in Cincinnati said they found no active sign of botulism or evidence of beatings.

In a White House statement, President Donald Trump said, “A lot of bad things happened, but at least we got him home to be with his parents.” He called North Korea a “brutal regime”.

Warmbier grew up in the Cincinnati suburb of Wyoming. He was a high achiever in his 2013 class at a highly rated high school and was on the soccer team.

Wyoming City Schools released a statement saying it was “deeply saddened” by his death. “The countless contributions he made to his school and community through his leadership, actions, and limitless enthusiasm will be felt far into the future,” the school district said.

Warmbier’s former English teacher said he would be “dearly missed”.

Warmbier had planned to study in China in his third year of college and heard about Chinese travel companies offering trips to North Korea. He was leaving North Korea on 2 January 2016 when he was detained at the airport.

The US Department of State warns against travel to North Korea. While nearly all Americans who have been there have left without incident, visitors can be seized and face lengthy incarceration for what might seem like minor infractions.

Jeffrey Fowle, also from Ohio, was detained in 2014 when he intentionally left a Bible in a nightclub. Fowle was freed after six months. He said he was kept isolated most of the time but not physically abused. He and others freed from North Korea have said they were coached and coerced into giving confessions. Three Americans remain held in North Korea. The US government accuses North Korea of using such detainees as political pawns. North Korea accuses Washington and South Korea of sending spies to overthrow its government.