Leaked surveillance video shows that diplomatic cars travelled to the consul general's home shortly after Khashoggi went into the consulate.
The promised money was put into US accounts the same day that Pompeo arrived in Saudi Arabia for meetings with the Saudi king and crown prince over the ongoing investigation of prominent journalist Jamal Khashoggi - an issue that has heightened tensions between the longtime allies.
Other reports suggest Saudi Arabia may admit he died during a botched interrogation.
In this photo from February 1, 2015, Saudi journalist Jamal Khashoggi speaks at a press conference in Manama, Bahrain.
Pompeo was to have a dinner Tuesday night with Prince Mohammed and was expected to fly to Turkey on Wednesday.
Under increasing global pressure, Saudi Arabia is reportedly trying to piece together an alibi over Khashoggi's disappearance.
Members of US Congress, including South Carolina Republican Senator Lindsey Graham and Democratic Senator Chris Murphy, have called for a change to Washington-Riyadh relations if the Saudi government is indeed responsible for Khashoggi's death. "You are going to get me in trouble".
On Monday, Mr Trump speculated that "rogue killers" may have been behind the journalist's disappearance.
In August, Saudi Arabia reacted strongly to a tweet from Freeland calling for the immediate release of detained activists, including Samar Badawi, a champion of women's rights and the sister of detained blogger Raif Badawi.
The interview was released after U.S. Secretary of State Mike Pompeo met with Saudi Arabia's King Salman and Crown Prince Mohammed bin Salman about Khashoggi, who was last seen October 2 entering Riyadh's consulate in Istanbul to fill out paperwork for his upcoming marriage to his Turkish fiancee, Hatice Cengiz. He offered his assessment after talks with the Saudi leadership and said the Crown Prince denied any knowledge of what happened to Khashoggi at the Saudi consulate in Istanbul.
Despite the lurid allegations published in media loyal to him, Turkish President Recep Tayyip Erdogan has also taken a circumspect line in the case, saying his priority is to uncover the truth through an investigation.
He said before arriving in Ankara that in Saudi Arabia he stressed the "importance of them conducting a complete investigation into the disappearance" and Riyadh had vowed to do this.
Turkish investigators acknowledged that searching the consulate 13 days after Khashoggi vanished wasn't ideal. Certain areas of the consulate were to remain off-limits, although officials would be able to inspect surveillance cameras, Turkish media reported. He said Saudi Arabia originally pledged its contribution in August, and US officials were expecting to receive it by the fall.
"This guy has got to go", said Senator Lindsey Graham, a Republican from SC, speaking on Fox television.
Trump's warning drew an angry response Sunday from Saudi Arabia and its state-linked media, including a suggestion that Riyadh could wield its oil production as a weapon.
"I hope you are comfortable here", the king told Pompeo, according to the reporters.
The source said the timing of the two events is no accident. "We just went through that with Justice Kavanaugh and he was innocent all the way as far as I'm concerned", he told the Associated Press.