Two women accused in Brooklyn of mistreating employees of their “orgasmic meditation” group argued that key evidence against them had been concocted for a true-crime documentary and had it thrown out of court.

The women, Nicole Daedone and Rachel Cherwitz, won a major pretrial decision in March when prosecutors said in court papers that they no longer considered a key witness credible for their criminal case.

That witness, Ayries Blanck, had been expected to testify this year in Brooklyn federal court and offer her journals about her experience at the company in question, OneTaste.

“The government no longer believes that the disputed portions of the handwritten journals are authentic,” prosecutors wrote to the judge overseeing the case. The diaries, they said, were actually transcribed by hand years later, and they will no longer call Ms. Blanck as a witness nor “seek to admit any of Blanck’s journals at trial.”

Their decision means a woman who had been central to prosecutors’ case will not be heard at all.

OneTaste in its heyday was a titillating blend of San Francisco’s counterculture and its tech boom — a wellness startup that made headlines by advocating female empowerment through orgasm. It offered classes and sessions that sometimes cost five figures.

But disaffected ex-employees said the company’s facade of liberation hid something cultish. Ms. Blanck’s account of her time at OneTaste and her journals were memorialized in a 2022 Netflix documentary, “Orgasm Inc.,” which painted a dark picture of a sexually coercive workplace where workers were manipulated and mistreated by Ms. Daedone and Ms. Cherwitz.