Mr. Mountbatten-Windsor was stripped of his royal titles in October by his brother King Charles III because of growing questions around his links to Mr. Epstein.
The woman told police she was at a party when she was drugged and assaulted by five boys, including Mr. Alexander, who is currently on trial for sex trafficking.
A recently filed court document points to a pattern of alleged assaults by Tal Alexander and his twin brothers Oren and Alon Alexander that predate the charges they are currently on trial for.
Materials released by the Justice Department revealed that leading business and political figures had enduring relationships with the disgraced financier.
Todd Blanche, the deputy attorney general, told reporters on Friday that “there’s a hunger or a thirst for information that I do not think will be satisfied by the review of these documents.”