HONOLULU - FBI Honolulu spokesperson Paul D. Delacourt says HPD officer Derek Hahn was arrested Wednesday morning. 46 year old Hahn was taken into custody without incident. This is the third HPD officer arrested by the FBI this week.

On Monday, Officer Minh-Hung “Bobby” Nguyen and retired Major Gordon Shiraishi appeared in federal court after being accused of corruption in the case involving former Chief Louis Kealoha.

The FBI could not comment further on Lt. Hahn’s because the case is sealed. Hahn made his initial appearance in United States District Court in Honolulu this afternoon.

An HPD spokesperson says, “Lt. Derek Hahn has 20 years of service and is currently assigned to the Communications Division. He will be placed on leave without pay pending investigation.”

Hahn is currently assigned to the Honolulu Police Department’s Criminal Investigations Division (CID), but was formerly a member of the Criminal Intelligence Unit (CIU).

In a criminal complaint filed on October 18, 2017, Hahn is alleged to have conspired with others to present false testimony and false evidence in connection with a federal investigation and trial of an individual accused of stealing a mailbox. The complaint further alleges that Hahn and the co-conspirators then set out to obstruct the subsequent FBI and federal grand jury investigation into their activities. Hahn is the fourth and most recent person charged in this FBI investigation of public corruption within the Honolulu Police Department.

In announcing this arrest, Delacourt stated, “The FBI is conducting a thorough investigation into allegations of public corruption and will exert every legal effort to ensure those responsible are investigated and prosecuted. In order to restore the public’s trust in its law enforcement, we are required to root out all responsible parties. This investigation is not over and we will continue to follow the facts wherever they lead us.”

A criminal complaint is only a charge and not evidence of guilt. The defendants are entitled to a fair trial in which it will be the government’s burden to prove guilt beyond a reasonable doubt. All defendants are presumed innocent until proven otherwise in federal court.