James Peaslee, 37, was arrested last month and charged with killing Paul Hilenski, 79, of Bridgewater.
Sheriff's deputies discovered his body inside his home after someone made a 911 call. He had been shot to death.
Peaslee was arrested the following day while driving through Easton.
Authorities have not discussed a possible motive for the crime.
Peaslee has a long criminal record and has been held without bail since the alleged murder.