FBI arrests retired Guam police officer for obstruction of justice, conspiracy to distribute

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(PNC photo)

The Federal Bureau of Investigation arrested a retired Guam police officer and two other individuals on Wednesday, June 26, following a joint investigation with other law enforcement agencies

Officers arrested John Topasna Mantanona aka ‘Boom’ in Inarajan. According to the Federal Bureau of Investigation, Mantanona was charged with obstruction of justice by endeavoring to influence a juror and conspiracy to distribute methamphetamine hydrochloride.

His brother, William Topasna Mantanona, was arrested in Chalan Pago. He was charged with obstructing justice by endeavoring to influence a juror and making a false statement to a federal agent.

Officers also arrested Gregorio Concepcion Tyquiengco, who had served as a juror in the federal drug case against Raymond John Martinez and Juanita Marie Quitugua Moser

Tyquiengco was arrested in Merizo and charged with contempt of court.

Aside from the FBI, the Bureau of Alcohol, Tobacco, Firearms and Explosives, Homeland Security Investigations, Coast Guard Investigative Service, United States Marshals Service, and United States Postal Inspection Service are jointly investigating the case involving the three defendants.