A textile worker in Brazil’s Goias state stands accused of poisoning a co-worker’s water bottle after quarreling with them over what the woman considered an unfair promotion.

The incident occurred last month at a textile factory in Abadia de Goias, a town in the Goiânia Metropolitan Region. Police claim that the 38-year-old suspect was caught by CCTV cameras tampering with another worker’s drink container before the latter drank from it and felt a burning sensation in her throat. Subsequent analysis of the container found a high concentration of a potent solvent in the water, which strongly suggests that the perpetrator wanted to poison their co-worker. Witnesses testified that the two women used to be friends, but their relationship went sour after the victim received a promotion that didn’t sit too well with the prime suspect in the poisoning case. They fought all the time and they had allegedly had an argument prior to the solvent poisoning.