USA v. Diamantis

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Case overview

Case Number:

3:24-cr-00108

Court:

Connecticut

Nature of Suit:

Judge:

Stefan R. Underhill

Firms

  1. October 22, 2025

    Ex-Conn. School Buildings Official Convicted Of Corruption

    A federal jury on Wednesday convicted Connecticut's former school construction director on corruption charges, agreeing with prosecutors that Konstantinos "Kosta" Diamantis accepted bribes, committed extortion and lied to both the FBI and the IRS about payments he admitted accepting from two construction firms.

  2. October 20, 2025

    Connecticut Official Had 'Dirtiest Hands Of All,' Jury Told

    Former Connecticut school construction director Kosta Diamantis was a "corrupt public official" who pushed local authorities to hire a masonry contractor and a construction management firm that paid him a cut of their negotiated government contracts, prosecutors told a jury during closing arguments Monday.

  3. October 17, 2025

    Ex-Official Enforced Fee Deal With Job Threat, Jury Hears

    Connecticut school construction director Kosta Diamantis on Friday admitted during cross-examination that he threatened to yank a masonry subcontractor from jobs in Tolland and Hartford if it didn't pay him what he claimed was a legitimate, agreed-upon $70,000 fee for lining up an introduction to a general contractor.

  4. October 16, 2025

    Ex-Conn. Budget Official Testifies $70K Payments Were Legit

    Connecticut school construction director Kosta Diamantis believed state ethics statutes and a 2016 U.S. Supreme Court case allowed him to pocket roughly $70,000 in return for introducing his former brother-in-law's masonry company to a prominent general contractor, a federal jury heard Thursday.

  5. October 15, 2025

    Feds Drop 1 Lying Count Amid Ex-Budget Official's Trial

    Federal prosecutors on Wednesday dropped one charge against Connecticut school construction official Kosta Diamantis, releasing him from allegations that he lied to the FBI when he allegedly said he didn't care who was hired to manage an emergency school construction project in Tolland.

  6. October 14, 2025

    Governor Won't Testify In Conn. Official's Corruption Case

    Connecticut Gov. Ned Lamont won't be called to testify in the bribery and extortion trial of former school construction official Kosta Diamantis after a judge agreed with prosecutors on Tuesday that additional testimony about Diamantis' character and demeanor would be irrelevant to the charges against him.

  7. October 09, 2025

    Conn. Official Pushed Firm That Hired Family, Witnesses Say

    Two local Connecticut officials on Thursday testified that Kosta Diamantis, a former state budget official accused of corruption, pushed them to hire a construction management firm they considered expensive and unnecessary without disclosing that the firm had hired his daughter and was allegedly paying him kickbacks.

  8. October 08, 2025

    Firm Owner Benefited From Ex-Official's Help, Jury Hears

    A construction management firm owner who claimed she felt pressured to pay Kosta Diamantis and to hire the Connecticut budget official's daughter also accepted business advice and landed government contracts with Diamantis' assistance, helping the fledgling company she launched without much experience, the official's attorney argued Wednesday.

  9. October 07, 2025

    Ex-Conn. Official Says Contractor Was The One Seeking Cash

    The first witness in a federal corruption case against former Connecticut budget official Kosta Diamantis is a repeat liar who misled his own masonry company's president into advancing his personal year-end bonus, which he used to leverage family connections and seek the government's favor, Diamantis' attorney suggested Tuesday during cross-examination.

  10. October 06, 2025

    'We Paid Him': Ex-VP Testifies In Former Budget Official's Trial

    Former Connecticut school construction grant director Konstantinos Diamantis claimed he was drowning in bills and increasingly demanded money when a masonry contractor didn't immediately pay kickbacks on the timeline he wanted, the construction company's onetime vice-president testified Monday.