Meng’s various jobs put him in close contact with Chinese leaders in the security establishment, a sector long synonymous with corruption, opacity and human rights abuses. Meng, a member of the Communist Party, worked with former security chief and Politburo Standing Committee member Zhou Yongkang, who is now serving a life sentence for corruption.

However, Meng’s wife sought to distance her husband from Zhou, saying the two men did not get on. She said Zhou had sought to muscle her husband out of the public security ministry — the national police force — several times and disliked her husband “very much,” She did not explain what, if any, relation that animosity may now have with her husband’s case.

Zhou was one of the highest-profile figures caught up in President Xi Jinping’s sprawling campaign against graft at all levels of government, military and state industry. Officials under suspicion often disappear into the party’s investigatory body, which can hold them for months without releasing information or providing them with legal counsel.

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Wong reported from Beijing. Angela Charlton contributed from Paris.