Earlier in the summit, the Saidi Crown Prince and Russian President Vladimir Putin were seen greeting each other with a high five and have come under criticism as both leaders have been accused of political assassinations.
The messages shared by Abdulaziz, which include voice recordings, photos and videos, paint a picture of a man deeply troubled by what he regarded as the petulance of the Crown Prince.
He was welcomed by Algerian Prime Minister, Ahmed Ouyahia, and ministers at the Houari Boumediene International Airport in Algiers.
The crown prince flew into the Argentine capital on Wednesday under a heavy cloud - in the midst of a global furor over the brutal killing of one of his most prominent critics, USA -based Saudi journalist Jamal Khashoggi, at the kingdom's Istanbul consulate October 2 - predictions were rife that he would be a pariah among his peers.
In an exclusive interview with CNN's Wolf Blitzer on the sidelines of the G20 summit, Pompeo again noted a lack of direct evidence linking bin Salman to Khashoggi's murder. The announcement was made in the presence of the Crown Prince and the Mauritanian president.More news: 'Baller', 'So Special' - Some Fans Praise Arsenal Star For Display Against Vorskla
According to the lawsuit, Omar Abdulaziz, a sharp critic on social media of the Saudi royals and a permanent resident of Canada, where he has received asylum, said he was friends with Khashoggi and worked with him on a project meant to rein in pro-monarchy Saudi trolls. The Crown Prince is believed to have ordered the murder of Jamal Khashoggi. May said, "and the importance of insuring that those who were involved are held to account". "Argentina took a firm stance to welcome [crown prince Mohammed] with full honors". The summit marked the Saudi Crown Prince's first major worldwide diplomatic test since the murder of Saudi journalist, Jamal Khashoggi, on October 2.
"Leaders should not just offer warm words against human rights atrocities but back up their words with action".
Saudi Arabia has said the prince had no prior knowledge of the killing.
The lawsuit says the plaintiff plans to argue that the co-operation between the two activists was "a crucial factor" in the decision to have Khashoggi killed, and that there was a direct link between the surveillance carried out on Abdulaziz and the slaying of the US -based columnist for the Washington Post.
A bevy of top Saudi ministers and businessmen were holding talks on Monday.