ABC has a tape showing:

A man in a UAE police uniform is seen on the tape tying the victim’s arms and legs, and later holding him down as the Sheikh [brother of the crown prince] pours salt on the man’s wounds and then drives over him with his Mercedes SUV.

Go ahead, click the link and watch it.  Maybe the guy had valuable information, and this was the only way to get it.  And the policeman?  Well, I’m sure that the Sheikh issued a legal opinion saying that it was just fine.   Nothing wrong here at all.  Just like the Americans do it.