Norwich police and state police spent Friday afternoon investigating inside a Norwich home on Crossway Street.
The investigation is connected to the homicide of a woman who was found dead on Monday a few blocks away on Spaulding Street, according to state police.
Casey Chadwick's death was ruled a homicide.
Troopers from the State Police Major Crimes Squad were wearing gloves and protective suits as they went in and out of the second floor of the apartment building at 5 Crossway Street.
State police would only say they were assisting Norwich police in the homicide investigation.