Former socialite Ghislaine Maxwell may be working on a deal with the Department of Justice, but prosecutors and victims warn she is not to be trusted. The imprisoned former madam of Jeffrey Epstein could provide key evidence related to the billionaire pedophile’s crimes after 2005 — the year previous investigations into his perverted conduct ended — but lawmakers are encouraged not to rely on her words alone.

Justice Department prosecutors interviewed Jeffrey Epstein associate Ghislaine Maxwell on Thursday, after officials said they would ask her about Epstein’s other associates—but critics have raised concerns about whether her testimony can be trusted, pointing to Maxwell’s ongoing prison sentence and history of allegedly lying under oath.