A man from St Catherine is charged with murder after his girlfriend dies following a domestic dispute in which she was allegedly injected with a toxic substance. According to reports, the man was initially charged with assault after the incident with his partner. Police allege that during the dispute, he assaulted the woman and injected her with a harmful chemical or substance. After the woman later dies, prosecutors upgrade the case to a murder charge. The reports describe the victim as the man’s girlfriend and state that she dies after “succumbing” to the injuries and effects of the alleged injection. The case centers on the claim that the injection caused the woman’s death, prompting the shift from an assault charge to a murder charge once she died. No further details about the specific substance, the circumstances of the dispute, or the investigation into the alleged injection are provided in the excerpts.