Police say officers responded to a home on Phillips Drive after neighbors reported hearing gunshots fired at around 7:20 a.m.
According to police, when officers entered the home, they found 90-year-old John Walton, Jr. and 87-year-old Irene Walton dead from gunshot wounds.
Police say the two lived in the home for many years and both were battling serious medical issues.
John Walton, Jr. was a former member of the Watertown Town Council and was an active member of the Watertown Police Commission.
The incident remains under investigation.