Three men were found guilty in the Graskop Circuit Court in Mpumalanga on Tuesday of murdering television personality and author Pieter Pieterse last year, SABC radio reported.
Ndukwana Makamo, Kenneth Mhlongo and Philemon Malinga were also found guilty of robbery.
The men earlier pleaded not guilty and denied knowing Frans Shabangu, a fourth suspect who turned state witness.
Pieterse (66) was murdered at his home in the holiday town of Marloth Park near Komatipoort last May.
His body was discovered by his wife, Jenny. He had been stabbed 28 times. — Sapa