Jensen Huang, CEO of AI chip giant Nvidia, resigned on Thursday, according to the supplied material, which describes the development as another twist in his downfall. The account links his resignation to questions surrounding Alice Huang, a Chinese businesswoman with whom he had an affair.

The US Justice Department says it has not yet reached a conclusion on whether Alice Huang was a spy. CNN is also reporting, citing sources from across the US intelligence community, that there is no definitive proof she was an intelligence asset for Beijing.