One of the suspects identified by Turkey in the disappearance of the Saudi dissident Jamal Khashoggi was a frequent companion of Crown Prince Mohammed bin Salman — seen disembarking from airplanes with him in Paris and Madrid and photographed standing guard during his visits this year to Houston, Boston and the United Nations.

Three others are linked by witnesses and other records to the Saudi crown prince’s security detail.

A fifth is a forensic doctor who holds senior positions in the Saudi Interior Ministry and medical establishment, a figure of such stature that he could be directed only by a high-ranking Saudi authority.