The 45-year-old managing partner of local accounting firm PKF Pacific Hawaii is scheduled to enter a plea in Circuit Court as early as Thursday on multiple counts  of theft, forgery and money laundering for allegedly stealing more than $500,000 from his company over a three-year period.

Patrick Oki is free after posting $250,000 bail following his arrest at the Honolulu Airport Sunday morning.

Oki is charged with 13 felony counts of first-degree theft, money laundering, use of a computer in commission of a separate crime, and second degree forgery.

Oki, a certified fraud examiner, also serves as the treasurer of Ahahui Koa Anuenue, the nonprofit fundraising arm of University of Hawaii athletics, and is a past president of the University of Hawaii Alumni Association. He was also an executive board member of the Boy Scouts of America Aloha Council.

“Over the weekend, we were surprised by the media reports concerning Patrick Oki. Mr. Oki does serve as an uncompensated, volunteer board member and treasurer for ‘Ahahui  Koa ?nuenue,” Brandt Farias, spokesperson, said in a statement. “In these capacities, Mr. Oki had no direct control or signing authority over any of our funds.  From that standpoint, and regardless of outcome, no donor money was every put at risk as a result of Mr. Oki’s involvement with AKA. We’d like to thank our donors for their past and future support. “

If convicted of the computer charge, Oki faces 20 years in prison with no possibility of probation.A grand jury indictment unsealed Monday morning said that for three years starting on Jan. 27, 2011, Oki perpetrated four fraudulent reimbursement schemes against PKF Pacific Hawaii LLP, which sustained losses of more than $500,000.

Oki was arrested on a grand jury bench warrant that was issued April 1, following a secret indictment. 

Agents from Immigration Customs Enforcement and Honolulu police arrested Oki at about 10:50 a.m. after he arrived on a flight from South Korea.

Oki made false entries in the firm’s books, forged signatures of fictitious persons, and deceived his partners, who reported the matter to law enforcement after they discovered that the “expenses” Oki claimed were personal and not work-related, Honolulu Prosecutor Keith Kaneshiro said in a written news release.

The indictment said that Oki falsely claimed he had incurred expenses in connection with services provided to clients.

He also allegedly created fictitious persons, companies, contracts, IRS forms, invoices, financial documents, websites, and e-mail addresses. 

PKF underwent a major restructuring last year after the departure of two partners and other key personnel.

“Honesty and integrity play vital roles in accounting because people rely on the information to make appropriate judgments,” Kaneshiro said in the news release. “When a senior partner engages in fraud and deceptive practices, they not only threaten the consumers of their work but the company they serve and every employee of that company. For that reason, they will be prosecuted.”

Last year, Kaneshiro’s office prosecuted Mikio Sato, the former Chief Financial Officer of Prudential Locations. Currently, the office is prosecuting Toni Ann Floerke, the former chief executive officer of Certified Hawaii.

Oki’s arrest came after a year-long investigation by Honolulu Police Department’s financial crimes detail. The case is being handled by Deputy Prosecuting Attorney Christopher T. Van Marter, head of the prosecutor’s white collar crime unit.