Ippei Mizuhara, the former interpreter for Shohei Ohtani who was fired late last month amid allegations he stole millions of dollars from the baseball star’s bank account to cover debts that Mizuhara owed to an illegal bookmaker, is in negotiations to plead guilty to U.S. federal crimes in connection with the purported theft, according to three people briefed on the matter.

The investigation, which began about three weeks ago after news of the alleged theft broke while Ohtani’s team, the Los Angeles Dodgers, was opening its season with two games in South Korea, is rapidly nearing a conclusion, according to the people, who spoke on the condition of anonymity because the inquiry is continuing.

A guilty plea from Mizuhara before a federal judge — likely to include an admission of a range of facts related to any illegal conduct — could confirm the account that Ohtani gave to reporters two weeks ago, in which he said he had no knowledge of what happened to the money.