Americans have been sentenced to years in North Korean prisons for such seemingly minor offenses as stealing a political banner and likely could not expect leniency if the country's drug laws were violated.
Rodman's arrival overlapped with his hosts freeing a comatose American college student they had imprisoned since January 2016 for stealing a propaganda poster.
"Dennis Rodman had nothing to do with the release of Mr. Warmbier", State Department spokeswoman Heather Nauert said in a press briefing in Washington on Tuesday. North Korea repatriated a sick USA citizen it had held captive for 17 months, and Dennis Rodman arrived with fanfare in Pyongyang.
USA officials refused to comment on his condition, but former ambassador and New Mexico governor Bill Richardson said he had spoken with the family.
It radiotelescopio the Washington Post that since March previous year their son is in a coma.
The White House says securing the release of an American college student from a North Korean prison "was a big priority" for President Donald Trump.
A University of Virginia student, Warmbier, 22, is due to arrive home in Cincinnati on Tuesday evening.
Warmbier's parents, Fred and Cindy, confirmed their son was on a medevac flight.
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The president called an earlier, similar lawsuit about the emoluments issue "without merit, totally without merit". Furthermore, it prohibits the president from accepting gifts or emoluments from state governments.
"We're just really glad that he's able to come back", Boettcher said.
PotCoin, which hopes to become the Bitcoin of the marijuana industry, is sponsoring the former National Basketball Association player's trip to North Korea to meet with the leader of the reclusive state, Kim Jong Un.
An American college student has arrived in OH after being released by North Korea, where he was serving a 15-year prison term with hard labor for alleged anti-state acts.
A student at the University of Virginia, he had flown to North Korea that January as a tourist. Chang also talks about N. Korea's missile capabilities and the timeline for their ability to strike the USA with a nuclear weapon.
It was not immediately clear if Rodman's visit to North Korea was purely coincidental with Warmbier's release.
However, before his arrival in Pyongyang, Rodman told reporters that pleading to free detained Americans is not the goal of his visit right now. They said they were told he has been in a coma since his trial, when he was last seen in public, and they had learned of this only one week ago. "We'll be relieved to have him home and are looking forward to surrounding him with people who love him".
North Korea announced Warmbier's arrest in late January 2016, saying he committed an anti-state crime with "the tacit connivance of the USA government and under its manipulation". On the same trip, he suggested an American missionary was at fault for his own imprisonment in North Korea, remarks for which he later apologized. US officials in touch with Yun and medical personnel declined to say whether Warmbier remains in a coma or to make any comment on his current medical condition. President Trump then promptly put into motion the process enabling Warmbier's safe return to his family in Ohio.
Sen. Rob Portman, R-Ohio, called Warmbier's arrest and trial "unnecessary and appalling", while lawmakers from Virginia also denounced North Korea's actions. Warmbier graduated from there in 2013 as class salutatorian and had played soccer.
Mr Rodman is a friend of North Korean leader Kim Jong-un and has made several visits to the country in recent years.
He, added: "North Korea should be universally condemned for its abhorrent behaviour".