BANGKOK -- Thai police have arrested a woman suspected of killing 13 people using pills laced with cyanide, saying they will widen a probe into a series of deaths that have gripped the nation. Sararat Rangsiwuthaporn, 36, was charged with premeditated murder of one victim, while the other deaths were still under investigation, police said. Sararat Rangsiwuthaporn, a suspect in over a dozen murders, is escorted by police officers at a police station in Bangkok, Thailand, April 25, 2023. Sararat Rangsiwuthaporn, 36, was charged with premeditated murder of one victim, while the other deaths were still under investigation, police said. Sararat Rangsiwuthaporn, a suspect in over a dozen murders, is escorted by police officers at a police station in Bangkok, Thailand, April 25, 2023.