A 21-year-old Bergen County man has been arrested after the death of a 19-year-old woman, found unresponsive in her vehicle, police said.

Michael Gaffney, of Maywood, was charged with reckless manslaughter, according to Bergen County Prosecutor Mark Musella. But it wasn't clear from information Musella released how, exactly, Gaffney was alleged to be responsible for 19-year-old Francis Victoria Garcia's death.

Hackensack Police responded to a 911 call early Saturday, after 2 a.m., to a vehicle parked outside an apartment complex at 140 Prospect St., Musella said.

Garcia, found in the car, was treated by officers and EMS members, but she was pronounced dead at Hackensack University Medical Center, Musella said.

The prosecutor also didn't say why Gaffney and Garcia were at the apartment complex or if they knew each other.

Musella said Garcia was with Gaffney in the rear seat of her vehicle at the time of her death.

An autopsy determined that she died from compression injuries to her neck, Musella said.

Gaffney, who is single and unemployed, was taken to Bergen County Jail pending a court appearance.

The prosecutor's office hasn't yet returned a message seeking more details.