Cecilia Steyn, Marcel Steyn and former insurance broker Zak Valentine are standing trial in the South Gauteng High Court for their alleged involvement in the murder of 11 people between 2012 to 2016. Three other people - including Marcel's mother, Marinda Steyn - are serving lengthy jail terms in connection with the killing spree. The initial killings were allegedly sparked by a split in a church group called Overcomers Through Christ (OTC). The group's stated aim was converting satanists to Christianity.