One of the Ageyl was lying dead with a bullet through his temple. The remaining Ageyl blamed Hamed the Moor. Hamed confessed.

“Then rose up the horror which would make civilized man shun justice like a plague if he had not the needy to serve him as hangmen for wages. There were other Moroccans in our army; and to let the Ageyl kill one in feud meant reprisals by which our unity would have been endangered. It must be a formal execution, and at last, desperately, I told Hamed that he must die for punishment, and laid the burden of his killing on myself.
Perhaps they would count me not qualified for feud. At least no revenge could lie against my followers; for I was a stranger and kinless.”

It would take three shots for Lawrence to carry out the execution.

“I called the Ageyl, who buried him in the gully where he was. Afterwards the wakeful night dragged over me, till, hours before dawn, I had the men up and made them load, in my longing to be set free of Wadi Kitan. They had to lift me into the saddle.”

Events of 13 March 1917 as recounted by T. E. Lawrence in Seven
Pillars of Wisdom (1926).