THROAT SLASH ON UWS

Woman, 70, slain

A gruesome trail of blood led police to the bedroom of an Upper West Side woman, where her lifeless body was discovered on the floor, her throat slit, sources said.

A worried friend had asked the police to check in on 70-year-old Susan Trott (inset) Sunday after she was not seen or heard from for a few days.

When officers got to her apartment on West End Avenue and West 95th Street at around 5 a.m. Sunday, they knew something was wrong as soon as they found a bloodsoaked pillow and a trail of gore leading to her bedroom, police said.

There were no signs of forced entry and nothing seemed to have been removed from her apartment, according to police. The murder weapon has not been recovered, sources said.

Trott — a copywriter and advertising maven who had done work for Levi’s, the Museum of Modern Art and Panasonic — appeared to have been dead for more than 24 hours, according to police.

Investigators could be seen Sunday hauling three large bags labeled “evidence” from the apartment.

“I can’t believe it. She was generous,” said a neighbor, Helen Stein, 72, who noted Trott was active in animalrescue circles.

Other building residents described her as “eccentric.” Trott was raised in Malba in northern Queens, family friends said.

She attended Pratt Institute and took a copywriting gig in London in the early ’80s before returning to her native New York in 1985, according to her LinkedIn page.

She had been married at least twice and had no kids, a family friend noted. She was a partner at the Code Modern marketing group.

“She was the kindest, gentlest person who would not kill a fly,” said Code Modern business partner Eric Boscia, who said he knew Trott for 20 years. “She was the most amazing advertising person I could ever think of. I’m trying to make sense of this.”

Boscia would not say whether he is the same business partner who alerted police. He last spoke with Trott on Wednesday, but it was an “uneventful” conversation, he told The New York Times.