He returned home to the Cincinnati area last week.
Congress last passed sanctions on North Korea in early 2016 with almost unanimous support.
He reiterated to the AP today, "They just murdered him".
At the time of Warmbier's release, a White House official said Joseph Yun, the US envoy on North Korea, had met with North Korean foreign ministry representatives in Norway the previous month. I believe it is quite clear that they have a heavy responsibility in the process that led to Mr. Warmbier's death.
One Beijing-based travel agent who said his name was Gong told VOA that Warmbier's death "no doubt" would negatively impact "foreigners' interest in traveling to North Korea".
Warmbier's hometown rallied around his family, wrapping school-color ribbons around trees and utility poles lining Wyoming's main road.
Trump has tried to leverage China, North Korea's only major ally, to apply more economic pressure on Pyongyang to help stop its nuclear and missile programs and other acts of defiance against the USA and its allies.
Warmbier's release - which came about after USA officials' "quiet diplomacy", a State Department spokesperson said at a briefing June 15 - doesn't change the way the Sneddons approach their efforts to find their son.
A Japanese diplomat said Warmbier's death showed that now was not the time to talk to North Korea and that allies must maintain unity in pressuring Pyongyang with sanctions.
SEE ALSO: What killed Otto Warmbier?
He said he had spoken with the Warmbier family. "But I realise what has happened to previous American citizens, including their deaths, '" McCain, R-Ariz., said in a brief interview.
The White House has quietly pushed for the release of all the Americans as a first step toward better relations, and President Trump has sometimes publicly indicated a willingness to talk with the North's leader, Kim Jong Un, about its pursuit of nuclear arms and missiles capable of striking the United States.
"Clearly, we're moving further away, not closer to those conditions being intact", White House press secretary Sean Spicer said. "And we will continue to, hopefully, build on the relationship and the dialogue that we've had with China".
"The United States once again condemns the brutality of the North Korean regime as we mourn its latest victim", Trump added.
Warmbier's death has only heightened US-North Korean tensions aggravated by dozens of North Korean missile launches and two nuclear bomb tests since a year ago in defiance of UN Security Council resolutions.
Mr Trump, however, seemed to signal he would not increase pressure on China in a tweet. "At least I know China tried!"
Other companies released statements saying they were reviewing whether to continue taking Americans to the North.
"We met 20 times with the North Koreans in NY, the United Nations representatives", he told Baldwin.