The LAPD confirmed they have an open criminal investigation into Derrick Rose regarding the rape accusations levied against the Knicks guard.<br />The letter — and the detective's testimony — will be used to persuade the judge in the $21.5 million civil case to change his ruling allowing Jane Doe's identity to be revealed.<br />That trial is slated to begin Oct. 4, meaning Rose could miss multiple Knicks preseason games and practices if he doesn't settle the suit.<br />Meanwhile, the LAPD wrote that Jane Doe's identity will remain anonymous throughout its separate investigation.