James Seipei (1974–1988), also known as Stompie Moeketsi, was a teenage African National Congress (ANC) activist from Parys in South Africa. He was kidnapped and murdered on 29 December 1988 by members of Winnie Mandela’s bodyguards, known as the Mandela United football club.

Moeketsi joined the street uprising against apartheid in the mid 1980s at age ten, and soon took on a leading role. He became the country’s youngest political detainee when he spent his 12th birthday in jail without trial. At the age of 13 he was expelled from school. Moeketsi was kidnapped on 29 December 1988 after a school rally, accused of being a police informer and murdered at the age of 14. His body was found in Soweto with his throat slit. Jerry Richardson, one of Winnie Mandela’s bodyguards, was convicted of the murder. He claimed that she had ordered him to abduct four young men from Soweto, of whom Stompie was the youngest. The four were severely beaten and Stompie’s body was later recovered by the police.