"They made the mistake when they killed Jamal Khashoggi in the consulate and they tried to cover up for it", he said. The Kingdom of Saudi Arabia is an absolute monarchy, and there are no significant checks on the crown prince's powers.
Khashoggi, who had been living in self-imposed exile in the United States, was reported missing hours after he entered the Saudi consulate to obtain paperwork that would allow him to marry his Turkish fiancée.
He described the 33-year-old prince as a "strong person; he has very good control".
CNN aired surveillance footage on Monday showing the man in Khashoggi's dress shirt, suit jacket and trousers.
One member of the 15-man team suspected in the death of Jamal Khashoggi dressed up in his clothes and was captured on surveillance cameras around Istanbul on the day the journalist was killed, a senior Turkish official has told CNN.
Madani, along with an accomplice, is seen walking to the central Sultan Ahmed Mosque, commonly known as the Blue Mosque, which he disappears into for a short amount of time.
TRT also published photographs showing Khashoggi entering the consulate wearing what appeared to be a black jacket, light gray short and gray trousers.
Shortly after Saudi Arabia admitted to Khashoggi's death, Trump said that he did not want to ruin a "tremendous order" of weapons from Saudi Arabia, and that he would prefer "some form of sanction". Against these must be weighed the crown prince's right-minded hostility to Iranian imperialism; his openness to an alliance with Israel; his realization that Saudi society's oppression of women is crippling it; and his oft-stated intention to end Saudi subsidization of Wahhabi radicalism around the globe.
"He was killed in the consulate".
But any direct challenge to Prince Mohammed's succession "may be destabilizing for the kingdom as a whole", said Cinzia Bianco, a London-based analyst for Gulf State Analytics.
An EU "code of conduct" on arms sales says member states ought to deny export licences if their weapons were to "prolong armed conflicts" or if clients violated "international humanitarian law".
Erdogan has remained largely silent on the case, although Turkey's pro-government newspapers have released information about events at the consulate. He adds Saudi officials do not know the whereabouts of Khashoggi's remains.
Officials in Saudi Arabia have not answered repeated requests for comment from The Associated Press in recent days, including on Monday.
Despite Riyadh's admission that its operatives were at fault for Khashoggi's death, and statements of remorse from members of its leadership, global outcry over the apparent murder is growing.
Last week, a leaked photograph apparently taken from surveillance footage showed Mutreb at the consulate, just ahead of Khashoggi's arrival. Mutreb's name also matches that of a first secretary who once served as a diplomat at the Saudi Embassy in London, according to a 2007 list compiled by the British Foreign Office.
For his part, Salah Jamal Khashoggi thanked the crown prince for his condolences.
"Many activists overseas don't speak up, fearful of bringing harm to their families back home, losing their scholarships or worse abduction and arrest". The Saudi statements did not acknowledge the ban.
Last week, a total of 23 consulate employees also spoke to the prosecutors. Prosecutors are seeking statements from a total of 45 employees, CNN Turk said.
However on Sunday, Saudi Foreign Minister Adel al-Jubeir further muddied the waters by saying that in fact the kingdom didn't know how the Washington Post columnist died.