Former State Official Found Guilty of Extortion and Bribery Scheme
October 22, 2025 - P.J. O’Brien, special agent in charge of the New Haven Division of the FBI, and Thomas Demeo, special agent in charge of IRS Criminal Investigation in New England, today announced that a jury has found Konstantinos "Kosta" Diamantis, 69, of Farmington, guilty of 21 counts of extortion, bribery, conspiracy, and false statement offenses related to his conduct as director of Connecticut’s Office of School Constructions Grants and Review (OSCGR), the state agency responsible for the grant administration of all Connecticut public school construction projects seeking state funding.
Diamantis demanded and received bribes from multiple contractors in connection with multi-million-dollar school construction projects he supervised as director of OSCGR. In exchange for those bribes and promises to pay bribes, Diamantis used his official position to assist contractors in obtaining and maintaining contracts to perform construction administration and masonry work for state-funded school construction and renovation projects. Diamantis also demanded payment in exchange for his actions and threatened to remove a contractor on projects if he was not paid.
Additionally, on three different occasions in 2023, Diamantis made multiple false statements to FBI agents investigating this matter.
“Government officials hold unique positions of public trust,” said FBI Special Agent in Charge P.J. O’Brien. “When officials abuse their position for personal financial gain, it not only affects every taxpayer but erodes the public trust of our sacred government institutions. FBI New Haven has a long history in this state of rooting out public corruption and delivering corrupt government officials to justice. I want to thank the IRS-Criminal Investigation for their partnership in this investigation and their diligent work. Today’s conviction demonstrates our commitment to protect taxpayers from criminal actors. We ask that the public continue to provide information regarding other instances of corrupt practices.”
“Today’s guilty verdict returned against Konstantinos Diamantis demonstrates IRS-CI’s continued commitment to rooting out all those who abuse their positions of power in the public sector for self-gain,” said Thomas Demeo, special agent in charge of the Internal Revenue Service-Criminal Investigation, Boston Field Office. “Diamantis’ greed overshadowed his commitment to serve the hardworking people of Connecticut and culminated in him serving his own self-interests at their expense. Let this serve as a warning to those who exploit their positions of public trust for personal gain. IRS-CI is committed to our continued collaboration with the FBI and all other law enforcement partners to stop and deter anyone who seeks to profit off of American taxpayers.”
Diamantis was convicted of two counts of extortion and two counts of conspiracy to commit extortion, offenses that carry a maximum term of imprisonment of 20 years on each count; two counts of bribery, an offense that carries a maximum term of imprisonment of 10 years of each count; two counts of conspiracy to commit bribery, an offense that carries a maximum term of imprisonment of five years on each count; and 13 counts of making false statements, an offense that carries a maximum term of imprisonment of five years on each count.
Diamantis was released pending sentencing.
This investigation was conducted by the Federal Bureau of Investigation and the Internal Revenue Service-Criminal Investigation Division. The case was prosecuted by Assistant U.S. Attorneys Jonathan N. Francis and David E. Novick.
FBI New Haven
Public Affairs
NHPublic.Affairs@fbi.gov
Source: Federal Bureau of Investigation (FBI)
Breaking News: Bondezz™ Appoints Brian Colando as Vice President of Sales to Lead Wholesale Expansion
