The Crown Prince also told associates in August previous year that if he failed to persuade Khashoggi to return to Saudi Arabia, "we could possibly lure him outside Saudi Arabia and make arrangements" - a communication the Central Intelligence Agency said "seems to foreshadow the Saudi operation launched against Khashoggi".
At a news conference in Buenos Aires, Trudeau said he had a "frank conversation" with the Saudi crown prince at the leaders' dinner on Friday.
Secretary of State Mike Pompeo vowed on Saturday that the United States would continue supporting Saudi Arabia's military campaign in Yemen, despite rising outrage over the kingdom. They confirmed and asserted their pride in the Crown Prince, who has overseen the Saudi Vision 2030 and led them in the march toward economic diversification and progress.
Trump has said it is vital to preserve the decades-old alliance with Saudi Arabia, as the kingdom is the top buyer of U.S. weapons and key oil supplier.
The Trump administration faces tremendous domestic and worldwide pressure to review its relationship with Saudi Arabia after Saudi journalist Jamal Khashoggi's murder at the Saudi consulate Istanbul in October this year.
Canada has been outspoken on human rights in Saudi Arabia, which has retaliated by breaking off diplomatic relations and vowing to end trade.
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The statement came after Pompeo and Defense Secretary Jim Mattis told the Senate that weakening of ties between the United States and Saudi Arabia over the killing would adversely affect the national security of America.
Local officials in a Washington neighborhood have voted to rename a street outside Saudi Arabia's embassy in honor of slain Saudi journalist Jamal Khashoggi.
The US intelligence community also has intercepts of communications before Khashoggi was killed that show Mohammed had ordered an operation to lure him back to Saudi Arabia.
The president has said that the strategic relationship with Saudi Arabia and the benefit to the U.S. economy from Saudi arms purchases are too important to rupture over the killing of Khashoggi, which he has condemned.
The Turkish president said Turkey had evidence that Khashoggi had been killed over the course of seven and a half minutes and had shared the evidence with those countries who had asked for it.
The US Treasury Department has sanctioned 17 individuals it said were involved in Khashoggi's death, including Qahtani, Mutreb and the Saudi consul general in Turkey, Mohammad al-Otaibi.
President Donald Trump, who has been accused of covering for the Saudi leadership, appeared to challenge that assessment about the prince, saying "maybe he did, maybe he didn't". Russian Federation and Iran back President Bashar al-Assad in Syria's civil war, while Saudi Arabia along with Western countries have backed some rebel groups.