The United States has called on the United Arab Emirates to review a court ruling which acquitted a member of its ruling family of torture charges.The court found Sheikh Issa bin Zayed al-Nahyan not guilty of abusing an Afghan man – apparently on grounds of diminished responsibility.A US state department official said questions had been raised and the US would welcome a careful review.US TV broadcast a video last year of the Afghan man being violently beaten. The sheikh, who is the half-brother of the UAE's president, Sheikh Khalifa bin Zayed, was acquitted on Sunday while five other defendants were found guilty.