Mariëtte Sonjaleen Bosch (1950 – 31 March 2001, later named Mariëtte Wolmarans) was a South African woman who was executed in Botswana on 31 March 2001. Bosch was convicted for the murder of Maria Magdalene "Ria" Wolmarans, both members of the white expatriate community in Gaborone, in June 1996. She was the first white woman to be executed in Botswana, and was the fourth woman to be hanged since the country's independence. Due to these two factors, the murder case received significant attention outside the country and was referred to as "Botswana's White Mischief".