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CEO Behind $29M Hawaiian Shipbuilding Fraud Sentenced to 13 Years in Jail

Semisub tour boat
Semisub was billed as a unique tour boat offering luxury experiences (Semisub)

Published Aug 6, 2025 6:44 PM by The Maritime Executive


The U.S. Department of Justice reports that the long-running fraud case involving a tour boat known as the Semisub has finally concluded with the CEO and his then-wife each sentenced to jail. The U.S. filed fraud charges in 2022 against CEO Curtiss E. Jackson and his then-wife, Jamey Denise Jackson, alleging they stole more than $29 million in a decade-long scheme.

According to court documents and evidence presented at trial, the U.S. alleged that the Jacksons 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. 

It was also reported that despite being barred from selling securities by authorities in the states of Pennsylvania and California, the defendants nonetheless continued to sell securities to investors across the U.S., including in those two states.

The Department of Justice detailed how the defendants used investor funds to pay for luxury residences in Hawaii and California, a Mercedes-Benz automobile, luxury vacations, psychics, and marijuana.

 

2017 construction photo released by Semisub of the nearly finished vessel

 

Semisub described itself as a specialized luxury cruise boat company with a proprietary vessel design. The boat was intended to allow passengers to look out underwater through special viewing windows while enjoying creature comforts inside, including high-end cuisine. The company reported that construction began in Long Beach, California, in 2008 on its first prototype and continued in Hawaii over the next 10 years. However, the U.S. Coast Guard said that the physical prototype boat differed materially from the naval architect's plans in 38 successive inspections, and when it finally won its COI in 2019, it only operated for a few months before engine trouble took it offline again.

As the fraud began to unravel, the U.S. contends that Curtiss Jackson further obstructed the official proceeding by attempting to flee the United States’ territorial waters aboard the Semisub One. At the time, the vessel was subject to criminal forfeiture proceedings, and he attempted to flee on the day before his bond revocation hearing.

Curtiss Jackson also sent a death threat to Jamey Denise during the investigation. The U.S. said he sent her a link to an online video containing graphic clips from The Sopranos television series depicting the deaths of several characters who had cooperated with the FBI. 

In May 2024, Curtiss Jackson was convicted of securities fraud, conspiracy, mail fraud, wire fraud, witness tampering, and obstructing an official proceeding while on pretrial release. Yesterday, August 5, he was sentenced to 13 years in prison.

Jamey Denise Jackson pleaded guilty in January 2023 to conspiracy to commit mail fraud and wire fraud. She was sentenced to two years in prison.