Homicide detectives have launched an investigation into the man’s death after he was found hanging in a holding cell around 7 p.m. Wednesday, police said. He was pronounced dead at the scene.

The 27-year-old man, who police didn’t identify, was initially arrested for driving while ability impaired by drugs, resisting arrest and obstruction of governmental administration just before noon on Wednesday.

He was transported to the Seventh Precinct to be held overnight for arraignment, police said.

A Lynbrook couple was found dead Thursday morning in what appears to be a natural cause death and a suicide. (Long Island Press)

An elderly man and woman married 20 years were both found dead Thursday morning inside their Lynbrook home, Nassau County police said.

“At this time it appears to be a natural cause death and a suicide,” Nassau County police spokesman Det. Vincent Garcia told reporters at the scene.

Police did not immediately release their names.

The 73-year-old woman is believed to have died of natural causes, pending autopsy results, police said. It appears that her 70-year-old husband died of a self-inflicted gunshot wound from a shotgun.

The couple was discovered after a home health care aid arrived at the house but was unable to get inside the locked door, Garcia said. The health care aid called the family and someone came by with a key to open the door when the discovery was made and a witness called 911 shortly before 10 a.m., police said.

The woman was found on a bed, police said, and her husband’s body was discovered nearby.

Officials said Nassau County District Attorney Kathleen Rice and an employee were at the scene. A spokesman for Rice’s office said the incident involved a relative of an employee of the district attorney’s office.