A man wanted in connection to the slaying of a New York City woman at a chic Hamptons resort was found dead in Pennsylvania, police said Wednesday.

Thomas Gannon, 56, was suspected of murdering 33-year-old Sabina Rosas at Shou Sugi Ban House in Water Mill, about 90 miles east of Midtown Manhattan, Suffolk County police said.

Gannon "was found dead of a self-inflicted gunshot wound at his home" in Honesdale, Pennsylvania, about 200 miles from the murder scene, according to a Suffolk County Police Department statement.

The alleged killer and victim, known as Sabina Khorramdel by her loved ones, knew each other, police said.

"We are not confirming the relationship, but we can say it was domestic in nature," a Suffolk County police spokesperson said.

Gannon's death will prevent the victim's loved ones from knowing exactly what happened, they said.

"While we are deeply saddened by the tragic loss of life, we also feel a profound sense of injustice," according to a family statement.

"Sabina deserves justice, and we were seeking accountability for her death. The loss of the suspect means we will never hear the truth about what happened to her. This outcome has robbed us of the opportunity to find closure through the legal process."

The victim was the eldest of three daughters and was also survived by her mother, father, fiancee and separated husband, her family said.

Rosas was found by an employee in a guest room on Monday afternoon. The slaying “appears to be an isolated incident” with “no immediate danger to the public at this time,” Southampton police said in a statement.

A representative for Shou Sugi Ban House could not immediately be reached for comment on Wednesday.

Shou Sugi Ban House bills itself as a resort that's "discreetly luxurious" and "grounded in sustainability and a deep love for raw natural beauty."

"Inspired by Japanese principles of wabi-sabi and a spirit of openness and exploration, Shou Sugi Ban House offers spa, healing arts, nutrition, fitness and complete wellness experiences in a holistic, educational setting," according to the resort’s website. "We welcome diverse points of view and are especially galvanized by the strength of women and the wisdom of community."

This is a developing story. Please check back for updates.