They got a call Monday night to check the well-being of a friend who had been living out of his car on Depot Street.
Officers said they checked this SUV and found Daniel Dennis, 61, dead in the back seat. The vehicle was parked in front of his family's residence.
They said according to family and friends Dennis had some serious medical issues, but he refused to receive any assistance.
Sabattus Police Chief Gary Baillargeon said "His family and friends, we know they tried to get him into a homeless shelter to help him out. He refused. Indicated he would rather live in his car. That's where he was."
Police said this is definitely not the result of foul play, but they would not speculate as to a possible cause of death.
They are waiting on the medical examiner to determine the exact cause of death.