US Secretary of State Mike Pompeo is expected to arrive in Riyadh over the next few days, where he's likely to press officials about the murder of Jamal Khashoggi.

A new report about one of the suspects accused of killing the Saudi journalist is raising concern.

According to the Washington Post, Saudi authorities are refusing to confirm the whereabouts of Saud al-Qahtani, who is accused of playing a major role in the crime.

In November, the Kingdom confirmed that he was being investigated and was barred to leave the country. There are concerns now that he could be influencing the investigation itself.

Saud al-Qahtani was a top aide to Saudi Crown Prince Mohammed bin Salman. He was fired in October - just days after the murder of Khashoggi came to light - and was among 17 Saudis sanctioned by the US government over the murder.

Al-Qahtani also played a central role in efforts to bring exiled critics, like Khashoggi, back to the country.

Khalil Jahshan, executive director of the Arab Center Washington DC, talks to Al Jazeera about Saud al-Qahtani.

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