A joint investigation with the FBI, and contacts with the police in Stamford and in New York City’s Diamond District, have failed to produce a suspect so far.

The jeweler, whose name has not been released, was headed to Boston on business when he stopped at the Home Depot at 700 Centre of New England Boulevard, just off Route 95.

He had bought light-switch plates from the store on a previous trip, and returned to buy more of the same kind, Beaulieu said. He then ate lunch at a nearby Applebee’s restaurant.

Returning to his car, a man he did not recognize pointed a handgun at him and ordered him into the back seat of his car, where the man bound his hands with plastic strips and duct-taped his mouth, Beaulieu said.

The robber took a bag containing the cash and jewels, as well as the dealer’s wallet, Beaulieu said.

The jewels were not insured, and the dealer was selling some of them on behalf of other people, Beaulieu said.

-- Journal staff writer Zachary Mider