Following retirement from playing he had been working in Johannesburg as a football coach and a taxi driver.
His body was found in Soweto on Monday, though it is believed he died on Saturday night.
“He was hijacked, they took his car and shot him in the head,” his brother Lewis told BBC Sport.
Yohane moved from Zimbabwe to South Africa in 1996 and played for top-flight side Wits, becoming captain and making a club record 268 appearances from 1997 to 2006.
He later became coach of the Wits’ developmental side, but was released from his job when the club sold its franchise to Tshakhuma Tsha Madzivhandila in 2020.