Retired Guam Police Officer and Former FBI Task Force Officer John 'Boom' Mantanona Arrested on Charges of Obstruction of Justice and Alleged Conspiracy to Distribute Methamphetamine

Others Arrested on Related Charges Resulting from a Joint Investigation

News Release from FBI, June 26, 2019

HAGATNA—John Topasna Mantanona aka 'Boom' was arrested today, June 26, 2019, and charged with obstructing justice by endeavoring to influence a juror and conspiracy to distribute methamphetamine hydrochloride.

His brother, William Topasna Mantanona, was also arrested today, June 26, 2019, and charged with obstructing justice by endeavoring to influence a juror and making a false statement to a federal agent.

Additionally, Gregorio Concepcion Tyquiengco, who had served as a juror in the case of United States v. Raymond John Martinez and Juanita Marie Quitugua Moser, was arrested today, June 26, 2019, and charged with contempt of court.

John Mantanona was arrested in Inarajan, Tyquiengco was arrested in Merizo, and William Mantanona was arrested in Chalan Pago, Guam.

The case was investigated by the Federal Bureau of Investigation, Bureau of Alcohol, Tobacco, Firearms and Explosives, Homeland Security Investigations, Coast Guard Investigative Service, United States Marshals Service, and United States Postal Inspection Service.

An Indictment is merely a charge and the guilt of the defendant must be proven beyond a reasonable doubt.

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