The diplomatic spat began when the U.S. president accused Pretoria of unaddressed human rights abuses, which the South African president continues to deny.
The United States has carried out at least 21 lethal strikes on suspected drug-smuggling vessels since September, killing more than 80 alleged traffickers.
‘In my professional opinion, the citizens of Georgia are not served by pursuing this case in full for another five to ten years,’ the prosecutor wrote.