U.S. Marshals Say They Know Where Kosta Diamantis Is as Tolland Seeks Restitution

Federal authorities say they know where convicted former Connecticut official Konstantinos "Kosta" Diamantis is, while the Town of Tolland is asking prosecutors to pursue restitution for possible losses connected to a school construction project at the center of his corruption case.

Diamantis remains a fugitive after failing to appear for sentencing in Bridgeport on September 17. He had been convicted by a federal jury in 2025 on 21 felony counts, including bribery, extortion, conspiracy and making false statements to federal investigators.

Matthew Duffy, a supervisory deputy with the U.S. Marshals Service, told Hearst Connecticut Media that the agency is conducting a fugitive investigation and has a warrant for Diamantis. Duffy said authorities know where he is, but did not disclose a specific location beyond Diamantis' public statements that he is in Greece.

That statement does not mean Diamantis has been arrested. As of September 25, authorities have not publicly announced that he is in custody, that Greece has begun formal extradition proceedings or that an extradition decision has been made.

The case also produced a new development involving the Town of Tolland.

On September 23, Town Manager Brian Foley sent a formal request to the U.S. Attorney's Office asking prosecutors to include Tolland among the potential victims considered for restitution. The request concerns possible financial losses connected to the town's $46 million Birch Grove Primary School project, which Diamantis oversaw while leading Connecticut's school construction program.

Tolland is reviewing contracts, invoices, payments, change orders, procurement decisions and other project records. The town expects to provide prosecutors with a preliminary estimate of its claimed losses by September 28.

The town has not yet identified a final dollar amount. Its request is also not a court finding that Diamantis owes Tolland money. It preserves the town's opportunity to seek compensation for losses it believes can be directly connected to the criminal conduct proven in the federal case.

Federal Judge Stefan Underhill ordered the parties to submit briefs by September 29 identifying victims who may qualify for restitution. The judge, not the town, will ultimately decide whether restitution is legally warranted and, if so, how much should be ordered.

Diamantis' sentencing remains scheduled for September 30. The court previously indicated that the hearing could proceed even if he is absent.

Prosecutors have sought a prison sentence exceeding 12 years. The final sentence will be determined by the judge. No new criminal charge specifically arising from Diamantis' flight has been publicly announced as of September 25, although a warrant was issued after he violated the conditions of his release.

Connecticut officials have also stopped the direct deposit of his state pension, and Diamantis has filed a lawsuit challenging that action. No court has yet issued a final ruling permanently restoring, reducing or revoking the pension.

The New England Voice will continue following the September 30 sentencing, any action by Greek or U.S. authorities, the restitution requests and the pension dispute.

This article is based on reporting by Hearst Connecticut Media, CT Post and NBC Connecticut. The New England Voice will update this report as new information becomes available.