Connecticut state police said Friday that the death a man found in his Willimantic apartment on Wednesday was a homicide.
Investigators initially listed William Alvarado's death as suspicious.
Police were called to the apartment complex at 621 Valley Street Wednesday after Alvarado, 73, was found dead in his apartment.
On Wednesday, Alvarado's family called his death a murder and asked anyone with information to come forward.
"William was just a sweet, generous, kind person who didn't deserve to die the way he died," Melissa Lee, Alvarado's niece, said. "Especially in his own home, where you should feel safe."
Family members said three people were brought in for questioning and released.
Anyone with information that could be useful to investigators is asked to call state police at 860-896-3230 or text TIP711 to 274637.