Former CEO of Guam Helicopter Company Sentenced to 405 Months in Federal Prison for Criminal Aviation Violations

Hagåtña, Guam – SHAWN N. ANDERSON, United States Attorney for the Districts of Guam and the Northern Mariana Islands, announced that John D. Walker, age 60, was sentenced on June 9, 2025 by Chief Judge Frances Tydingco-Gatewood in the District Court of Guam to 405 months imprisonment.  On September 9, 2022, a jury returned guilty verdicts against Walker and his company, Hansen Helicopters, Inc., on 110 counts involving conspiracy to defraud the Federal Aviation Administration (“FAA”) and National Transportation Safety Board (“NTSB”), aircraft parts fraud that caused serious bodily injury and death, employing a mechanic without a mechanic’s certificate, registration violations involving helicopters, conspiracy to commit wire fraud, wire fraud, and money laundering.  Walker was also ordered to pay a $250,000 fine, and a $9,900 special assessment fee.  Walker forfeited $58,407,513, which represented the proceeds of aircraft parts fraud and wire fraud, in addition to $11,770,000, which represented the amount of money involved in the money laundering offenses.

Hansen Helicopters, Inc., was found guilty of conspiracy to defraud the FAA and NTSB, in addition to aircraft parts fraud that caused serious bodily injury and death.  Hansen received a five-year term of probation, a $4,900,000 fine, and a $2,000 special assessment fee.

Walker subverted aviation laws and regulations, enforced by the FAA and NTSB, which protect public health and safety.  Walker used at least 48 shell companies, most incorporated internationally, to operate an illicit helicopter/pilot/mechanic leasing business in Guam. By concealing that his aircraft were unregistered or illegally registered, unairworthy, and maintained and operated by uncertificated airmen, Walker entered fraudulent lease agreements with numerous tuna boat companies.  He earned over $400 million dollars through his scheme. He concealed his crimes by forging documents, counterfeiting aircraft parts, and bribing aviation officials.

“The defendants built helicopters from an assortment of discarded frames and counterfeit parts,” stated United States Attorney Anderson. “They blatantly disregarded aviation laws to build and operate aircraft that should never have left the ground.  Fishing companies throughout the Pacific region relied on these aircraft for spotting tuna.  Unfortunately, the defendants’ quest for money resulted in the deaths of many pilots.  This was a difficult case to investigate and prosecute, but well worth federal resources. I commend our law enforcement partners on bringing these defendants to justice.”

“Unchecked greed and flagrant disregard for aviation safety create a recipe for disaster with catastrophic results,” said Special Agent in Charge Cory LeGars of the Department of Transportation Office of Inspector General, Western Region. “This sentencing epitomizes the criminal justice system’s commitment to holding individuals and companies accountable for egregious illicit conduct. I commend the relentless efforts of our special agents and the outstanding collaboration between our law enforcement, prosecutorial, and regulatory partners, whose collective efforts brought this complex and hazardous fraud scheme to justice.”

“How many times have we heard, ’It’s just money…’ when it comes to financial crime?” asked Special Agent in Charge Adam Jobes, IRS Criminal Investigation (IRS-CI), Seattle Field Office. “This case shows that all too often, innocent people suffer catastrophic harm because of someone else’s greed. Financial crime is not victimless, and IRS-CI will continue to protect our communities from people like Mr. Walker who put their greed above all else.”

“Over several years, Mr. Walker engaged in a multi-layered scheme to bribe public officials and defraud the government, significantly jeopardizing public safety in the process,” said FBI Honolulu Special Agent in Charge David Porter. “The FBI remains steadfast and persistent in our efforts to investigate these schemes and bring bad actors to justice.”

This investigation was conducted by the U.S. Department of Transportation, Federal Aviation Administration, Internal Revenue Service Criminal Investigation, Federal Bureau of Investigation, and in partnership with the Customs and Quarantine Agency of Guam.

Assistant United States Attorney Stephen F. Leon Guerrero, Special Assistant United States Attorney Marie L. Miller, and former Assistant U.S. Attorney Samantha R. Miller prosecuted this case.