NYPD cop Frank Marra saw ghost while searching for clues to identify World Trade Center victims

A retired NYPD cop who sifted through ten tons of debris from the September 11th attacks, reported seeing a ghostly lady at the Staten Island landfill, a new book reveals.

Sgt. Frank Marra, 48, was not the only one who saw the specter, who a psychic medium has explained could have been a spirit, 'soul collector', guiding people to the afterlife, according to the New York Post.

In his book, From Landfill to Hallowed Ground, Marra details his experience searching through rubble and remains of the World Trade Center attacks from September 2001 to February 2002 at Fresh Kills landfill.

While there, volunteers found 54,000 personal objects and helped identify 1,200 people who perished.

The 17-year veteran cop shares about the spirit he and other volunteers saw at the Staten Island landfill, also known as 'The Hill'.

The spirit Marra and other cops reported seeing was an African-American woman, dressed in white like a Red Cross worker during the Second World War, was seen carrying a tray of sandwiches.

While they were rare sightings, he stashed them away as memories, until about a year later when he spoke to a retired crime-scene detective who mentioned the ghost.

While his sightings of the ghost were rare, he stashed them away as memories, until about a year later when he spoke to a retired crime-scene detective who mentioned the ghost.

Along with the Red Cross worker, other cops and volunteers witnessed seeing other things while in the landfill from shadows to large black masses.

Along with the Red Cross worker, other cops and volunteers witnessed seeing other things while in the landfill from shadows to large black masses, according to Marra.

The retired cop who now resides in New Jersey with his wife and three sons also notes how the landfill, with its memories of the tragic September 11 attacks, quickly became a holy ground.

Marra said: 'As time passed we realized how many people's ashes and DNA still remain at the landfill.