Federal prosecutors have asked a judge to sentence Konstantinos "Kosta" Diamantis, the former head of Connecticut's school construction office, to more than 12 years behind bars for orchestrating a multi-year bribery and extortion scheme. The government's request stands in sharp contrast to the defense's position, which urges the court to bypass incarceration entirely in favor of home confinement.
Diamantis, a former state lawmaker and attorney who once wielded immense influence over municipal building funds, is scheduled to appear on Thursday for sentencing before U.S. District Judge Stefan Underhill at the federal courthouse in Bridgeport. The upcoming hearing follows a nine-day trial last October in which a federal jury convicted Diamantis on 21 counts, including bribery, extortion, conspiracy, and providing false statements to federal investigators.
In a comprehensive sentencing memorandum, Assistant U.S. Attorneys David E. Novick and Jonathan N. Francis portrayed the 70-year-old defendant as a calculating official who repeatedly betrayed the public trust for personal enrichment. Describing his conduct as fueled by greed and a profound lack of integrity, prosecutors argued that Diamantis merits a sentence within the advisory federal guideline range of 121 to 151 months, which reaches up to 12 years and seven months.
The prosecution emphasized that the illicit operation was not an isolated misstep or a momentary error in judgment, but rather a persistent pattern of systemic corruption that spanned from 2018 through 2021. Throughout that multi-year period, prosecutors said, Diamantis exploited his high-ranking state post to bully contractors into providing him with cash payments and other personal benefits in exchange for lucrative school construction assignments.
Conversely, defense attorney Norm Pattis filed a motion asking the court to grant Diamantis home detention accompanied by a maximum term of probation. In the filing, Pattis stated that while his client does not minimize the gravity of the jury’s guilty verdict or the seriousness of his breach of public faith, a prison sentence is unnecessary given the collateral consequences Diamantis has already suffered.
The defense argued that a combination of mitigating factors supports keeping Diamantis out of prison. Pattis cited Diamantis's advanced age, his lack of physical dangerousness, his complete loss of the state role that facilitated the misconduct, his diminished future earning potential, and the state of financial ruin into which he has fallen. Pattis maintained that locking up a 70-year-old man for a decade or more would provide minimal additional sentencing value.
Under the defense proposal, Diamantis would remain subject to strict conditions designed to protect the public and provide accountability. These terms would include permanent bans against holding future government employment or securing public contracts, mandatory financial disclosures, routine monitoring, the payment of court-ordered restitution where appropriate, and a strict prohibition against profiting in any way from his criminal offenses.
During his federal trial, Diamantis testified that his work with the implicated contractors was merely off-hours legal and consulting services for firms involved in multimillion-dollar school ventures in Hartford and Tolland. However, jurors ultimately rejected his explanations, choosing instead to credit the testimony of corporate executives who had already entered guilty pleas for their participation in the corrupt arrangements.
Among the key prosecution witnesses was Antonietta Roy, the owner of Construction Advocacy Professionals. Roy testified that she capitulated to Diamantis's demands out of fear that her company would lose out on lucrative state-backed contracts, agreeing to hire Diamantis's daughter for an administrative position paying $45 per hour for what prosecutors described as a low-show job with inflated compensation. Roy also provided Diamantis with $4,500 in cash and checks.
Jurors also heard extensive testimony from John Duffy, Diamantis's former brother-in-law and the vice president of Middlefield-based Acranom Masonry. Duffy revealed to the court that his company's winning bid on a substantial school building project had been intentionally budgeted to incorporate an illicit $70,000 payoff directed straight to Diamantis.
In their sentencing filing, federal prosecutors stressed that Diamantis’s scheme specifically preyed upon vulnerable municipalities. Because Connecticut's school construction financing framework often leaves under-resourced districts reliant on state approvals and funding allocations, less-affluent communities were uniquely exposed to Diamantis's coercive demands and favoritism.
The government noted that this manipulation compromised the quality and safety of public school construction, as vendor selections were driven by kickbacks rather than contractor competence. Prosecutors pointed out that Diamantis forced officials in Hartford to employ Acranom Masonry for the fourth phase of the Weaver High School project, even after the firm had performed masonry work on earlier phases that was so substandard that large portions had to be torn down and rebuilt.
Diamantis, who remains free on a $500,000 bond while awaiting Thursday's proceeding, has seen his professional career dismantled in the wake of the prosecution. In February, following his conviction on all 21 counts, the veteran attorney formally resigned from the Connecticut state bar.
The resolution of this case will not conclude Diamantis's legal challenges, as he faces a second federal corruption trial scheduled to begin early next year. In that pending matter, prosecutors allege that while working at the state Office of Policy and Management, Diamantis accepted $100,000 in payments to use his official influence to halt a state audit into a Bristol-based eye care practice that was suspected of participating in healthcare fraud.
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