Abraham Smit was arrested two weeks ago by the Hawks after apparently evading American authorities.
Hugo Ras and 9 others were arrested earlier this month in connection with a spate of poaching incidents.
10 people arrested in connection with a rhino poaching syndicate will appear in court today.
Those found to be involved in syndicates include a Hawks official, a pilot and an attorney.
The three were found in possession of a hunting rifle, ammunition and poaching equipment.
The group is believed to be responsible for the slaughter of 84 rhino between 2008 and 2012.