Otto Warmbier returns home: A timeline of the student's North Korea detainment

More than a year after he first arrived in North Korea, 22-year-old American college student Otto Warmbier returned home to Cincinnati with his parents this week after being detained in North Korea for nearly 13 months full months.

It is now known that Warmbier has been in a coma since March 2016, when he was sentenced to 15 years of hard labor after being arrested on charges of stealing an item with a propaganda slogan on it.

Click through for a timeline from Otto Warmbier's arriving in North Korea to this week's homecoming events:

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Otto Warmbier: A timeline of the student's North Korea imprisonment
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Otto Warmbier: A timeline of the student's North Korea imprisonment

January 2016: Warmbier is imprisoned in North Korea, charged with stealing an item that had a state propaganda slogan on it.

March 2016: Warmbier is sentenced to 15 years of hard labor in North Korea

March 2016 - 2017: The United States advocates for North Korea's allowing Sweden access to Warmbier and three other American citizens, pushing for their release.

January 2017: President Trump is inaugurated as the 45th president of the United States, signaling a seat change in American foreign diplomacy.

February 2017: Secretary of State Rex Tillerson briefs President Trump on the situation surrounding Warmbier's imprisonment in North Korea.Trump directs Tillerson to take all appropriate measures in securing the release of U.S. hostages in North Korea.

May 2017:  The U.S. State Department and North Korean Ministry of Foreign Affairs hold a meeting in Oslo, Norway, during which they agree to the Swedish Embassy in Pyongyang's access to all four detainees. Sweden is later granted these visitation rights, prompting North Korea to request a meeting with the United States.

June 6, 2017 - State Department Special Representative Joseph Yun meets with North Korean ambassador Pak Gil Yon at the United Nations in New York. Yun learns during this meeting that Warmbier has been in a coma for over a year.

June 6-11, 2017: Secretary of State Tillerson instructs Yun to travel to North Korea with the mission of bringing back Warmbier. They travel with a medical team to Pyongyang.

June 12, 2017: Through Yun, the United States is able for the first time to confirm Warmbier's status. The U.S. demands Warmbier be released on humanitarian conditions. North Korea complies.

June 13, 2017: Warmbier is evacuated from North Korea, travels to Ohio where he will reunite with his family.

June 13, 2017: Otto Warmbier arrives home to Cincinnati, Ohio
June 15, 2017: Otto Warmbier's father, Fred, speaks out during a press conference on his son's return home.
June 15, 2017: Doctors give updates on Warmbier's status during a news conference at the University of Cincinnati Medical Center in Cincinnati, Ohio.
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Doctors have concluded that Warmbier suffered a "severe" neurological injury during the time of his imprisonment under what Warmbier's father, Fred, called the "pariah regime." North Korea blamed Warmbier's comatose state -- described by a doctor as "responsiveness wakefulness" -- on botulism, but Fred Warmbier doesn't buy it.

"We don't believe anything they (North Korea) say," said Fred Warmbier, who was wearing his son's sport coat as he discussed Otto during a Thursday press conference.

North Korea's official KCNA news agency said in a one-line report on Thursday the student was "sent back home on June 13, 2017 on humanitarian grounds according to the adjudication made on the same day by the Central Court of the DPRK."

RELATED: A look at the scene from Otto Warmbier's US arrival

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US student released from North Korea
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US student released from North Korea
A person believed to be Otto Warmbier is transferred from a medical transport airplane to an awaiting ambulance at Lunken Airport in Cincinnati, Ohio, U.S., June 13, 2017. REUTERS/Bryan Woolston TPX IMAGES OF THE DAY
People, believed to be family members, embrace next to the medical transport plane carrying Otto Warmbier before he was transferred to an awaiting ambulance at Lunken Airport in Cincinnati, Ohio, US, June 13, 2017. REUTERS/Bryan Woolston
Local residents hold signs of support to welcome home Otto Warmbier at Lunken Airport in Cincinnati, Ohio, US, June 13, 2017. REUTERS/Bryan Woolston
People, believed to be family members, embrace next to the medical transport plane carrying Otto Warmbier before he was transferred to an awaiting ambulance at Lunken Airport in Cincinnati, Ohio, US, June 13, 2017. REUTERS/Bryan Woolston
People, believed to be family members, approach and board the medical transport plane carrying Otto Warmbier before he was transferred to an awaiting ambulance at Lunken Airport in Cincinnati, Ohio, U.S., June 13, 2017. REUTERS/Bryan Woolston
A person believed to be Otto Warmbier is transferred from a medical transport airplane to an awaiting ambulance at Lunken Airport in Cincinnati, Ohio, U.S., June 13, 2017. REUTERS/Bryan Woolston TPX IMAGES OF THE DAY
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