CEO and President of Hawaii Shipbuilding Company Sentenced for $29M Investment Fraud Scheme

News Release from U.S. Attorney's Office, District of Hawaii, August 6, 2025

HONOLULU – A formerly married couple was sentenced yesterday for their roles in a more than decade-long scheme to defraud hundreds of investors out of millions of dollars in connection with Semisub Inc. (Semisub), a Hawaii-based company. Curtiss E. Jackson, 72, of Honolulu, Hawaii, was sentenced to thirteen years in prison, and Jamey Denise Jackson, 62, currently of Cochester, Connecticut, and formerly of Honolulu, was sentenced to two years in prison. 

According to court documents and evidence presented at trial, Curtiss Jackson and Jamey Denise Jackson, who were respectively Semisub’s CEO and President, falsely told investors for years that the prototype vessel, Semisub One, was “weeks” or “months” away from beginning operations. The defendants also solicited funds based on false statements that Semisub had entered into agreements or developed relationships with government agencies and a private investment firm to build and sell a fleet of “Semisubs” for tens of millions of dollars — among other misrepresentations. As a part of the scheme, the defendants used investor funds to pay for luxury residences in Hawaii and California, a Mercedes-Benz automobile, luxury vacations, psychics, and marijuana. 

Curtiss Jackson also sent a death threat to Jamey Denise Jackson during the investigation, in the form of a link to an online video entitled “Death of FBI Informants” containing graphic clips from The Sopranos television series depicting the deaths of several characters who had cooperated with the FBI. Curtiss Jackson further obstructed an official proceeding by attempting to flee the United States’ territorial waters aboard the Semisub One, which was subject to criminal forfeiture proceedings, on the day before his bond revocation hearing. 

In May 2024, Curtiss Jackson was convicted by a jury of securities fraud, conspiracy, mail fraud, wire fraud, witness tampering, and obstructing an official proceeding while on pretrial release. In January 2023, Jamey Denise Jackson pleaded guilty to conspiracy to commit mail fraud and wire fraud. 

Acting Assistant Attorney General Matthew R. Galeotti of the Justice Department’s Criminal Division; Acting U.S. Attorney Kenneth M. Sorenson for the District of Hawaii; Inspector in Charge Eric Shen of the U.S. Postal Inspection Service (USPIS) Criminal Investigations Group; and Special Agent in Charge Adam Jobes of the IRS Criminal Investigation (IRS-CI) Seattle Field Office made the announcement.

The USPIS and IRS-CI investigated the case. 

Trial Attorneys Matthew Reilly and Jennifer Bilinkas of the Criminal Division’s Fraud Section and Assistant U.S. Attorneys Margaret Nammar and Aislinn Affinito for the District of Hawaii are prosecuting the case.

---30---

HNN: Hawaiʻi-based CEO sentenced to 13 years for fraud