The bodies of Maureen Daley, 67, and Jonathan Miller, 53, were found in their home in the 300 block of E. Highland Avenue in the Lindalia neighborhood near Newport, Delaware on Wednesday afternoon.
Neighbors tell Action News the couple had not been seen since fall 2015.
PHOTOS: Investigation into death of Delaware couple
RAW VIDEO: Couple found dead in home
A woman who didn't want her face on camera says she called 911 when she noticed something wasn't right.
"She always took care of her yard, and if there were twigs and branches that needed to be cut," the woman said. "There was no lights on the in the house or anything like that so I finally decided enough is enough, somebody needed to check on them."
Like most of his neighbors, Bill Derbyshire said he thought the couple was traveling.
"It just never occurred to us that anything was out of the ordinary," said Derbyshire.
Police say there doesn't appear to be foul play, and at this time they don't know how long the bodies have been in the home.
Police: right now unclear how long couple had been dead inside home. Neighbors tell @6abc the last time they were seen was Fall 2015— Christie Ileto (@Christie_Ileto) April 14, 2016
"We're not 100 percent sure what happened," said Duffy. " Was it medical? Could it have been foul play? Those are all the questions that, once there's been an autopsy, we'll be able to determine," said New Castle County Police Cpl. Tracey Duffy.