A note that Jeffrey Epstein 's former cellmate claims to have found after the financier's first suspected jail suicide attempt in 2019 has been made public — not because of the Justice Department 's release of records related to the sex offender, but as part of an unrelated case. The government's explanation: It never had the note. “The note has not yet been authenticated, and this is the first time DOJ is seeing it as well," the department said Thursday when asked why it wasn't part of the voluminous Epstein files. Nicholas Tartaglione said he discovered the handwritten note in a book after the disgraced financier was found in their cell at a Manhattan federal jail with a strip of bedsheet around his neck. Epstein was subsequently moved to a different cell, where a few weeks later, he was found dead, alone, in a suicide.…