Duangporn Pornprasert, 42, voluntarily surrendered to police May 31 after admitting to stabbing Pichai Suksawatnamchok to death at a row house near a furniture factory on Thepprasit Road Soi 11.
Police found the body of 42-year-old Pichai in a pool of blood, two stab wounds each to the chest and back.
Police said Duangporn admitted to the killing after learning from her younger sister that her ex-boyfriend had raped her. Duangporn said she confronted Pichai, seeking redress for the attack that left her sibling hospitalized, but he only showed indignance. Enraged, Duangporn said she stabbed him, then called police.