NEW YORK (1010 WINS) — An elderly Hollis Hills couple was found dead by police in their Hollis Hills home early Tuesday morning.

Neighbors said they hadn’t seen Phillip, 88, and Lilian Zimmer, 84, for quite some time.

LISTEN: 1010 WINS’ Steve Sandberg reports

“They were both old, we hadn’t see the mother in years. She was bed-ridden, I believe, and the father was just getting weaker and weaker,” a neighbor told 1010 WINS’ Steve Sandberg.

The neighbor, who has lived next door for 30 years, said the couple heavily relied on their son, Stuart, believed to be in his 50’s.

“He was their caregiver,” the neighbor said.

But authorities said the couple’s  son suffered from mental illness. That may explain why he lived in the family’s home for days even after both his parents had died, Sandberg reported.

Authorities blamed the deaths on natural causes. No charges were being filed.

The couple’s son was taken to the hospital for evaluation.

Watch & Listen LIVE