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Jury Finds Kosta Diamantis Guilty on All 21 Counts in Federal Trial

Konstantinos Diamantis was convicted of bribery, extortion, and conspiracy for demanding payments and jobs from contractors in exchange for school construction contracts, jurors found him guilty on 21 counts.

  • The jury in Bridgeport returned a guilty verdict Wednesday, convicting Konstantinos 'Kosta' Diamantis, Connecticut's former deputy budget director, on 21 federal counts including extortion and bribery.
  • Prosecutors say Diamantis exploited his role at the Office of School Construction Grants and Review from 2018 to 2021 to force two contractors to pay bribes and secure a job for his daughter in Tolland, Hartford and New Britain.
  • Witness testimony described cash deliveries and quid pro quo payments, including envelopes handed to Diamantis by Sal Monarca and John Duffy at restaurants and his home, plus a $40,000 demand tied to Acranom Masonry's school bid.
  • Sentencing is set for Jan. 14, and Diamantis will stay free on bond until then; Norm Pattis said he plans to appeal and warned of a 10-to-12-year sentence, while a second federal trial is expected next year.
  • Gov. Ned Lamont released a statement after the verdict, saying he removed Diamantis in 2021, ordered an independent review, and returned oversight to the Department of Administrative Services.
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NBC Boston broke the news in Boston, United States on Wednesday, October 22, 2025.
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