Evacuations and street closures in the Gales Ferry section of Ledyard have concluded following an investigation at a home on Thursday.
Law enforcement said they found objects of "significant concern" while serving a federal warrant at a home on Whalehead Road.
Police said a man, Daniel DiCicco, was wanted on three outstanding warrants.
A federal weapons-related search warrant was issued for the property at 70 Whalehead Rd. this week and agents and officers went to the house around 9:25 a.m. Thursday to serve it.
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Surveillance of the property showed a man on the ground toward the back of the property and agents and crisis negotiators received no response while trying to contact him.
Once they were able to get inside, DiCicco was dead, police said. The Connecticut State Police Eastern District Major Crime Unit is handling the investigation into his death.
The Federal Bureau of Investigation and state police are assisting with the investigation.
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The incident is isolated to the area of the residence, but several neighbors in the immediate area were temporarily evacuated and the roads were closed as a precaution.
The search continued for several hours and the road has since reopened.
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