Ghislaine Maxwell is among the scores of people who think there's no way in hell her former boss Jeffrey Epstein killed himself in jail ... and she has a theory who may have done it.

Here's the deal ... on Friday, the Justice Department released a transcript of the interview Deputy Attorney General Todd Blanche recently conducted with Maxwell ... and she's straight-up asked her opinion on his 2019 death. Getty

Maxwell says she does not buy the official manner of death as suicide ... but she also says he was not killed to keep quiet about his powerful friends -- and the dirt the accused child sex trafficker may have had on them.

If the political financier was indeed murdered ... Maxwell told Blanche it was done by another inmate -- and, that she learned from her time in th

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