The suspect behind the shocking slaying of an artist at a luxury New York wellness center has been found dead of a self-inflicted gunshot wound at his home in Pennsylvania, police said.

Suffolk County police were looking for Thomas Gannon, 56, in connection with the slaying of Sabina Rosas, a 33-year-old Brooklyn artist who was found dead in a guest room at the Shou Sugi Ban House of Water Mill, New York.

Rosas was an artist who studied new media at Purchase College in New York, graduating in 2020, a school spokesman confirmed.

The two had been romantically involved for several years, according to Liz Phillips, one of Rosas’ former Purchase teachers, who had become friends and expected her to come Monday.

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Sabina Rosas was photographed at a recent art event during a trip abroad, just days before she was killed at a spa in the Hamptons community in New York. (Instagram/@ruyo.journal)

Rosas was born in Tajikistan, part of the former Soviet Union, and her family fled when she was just a child to escape civil war. They bounced around Europe and Central Asia before she arrived in the US in 2009, where she studied art.

“She was an extraordinary young woman,” Phillips told Fox News Digital. — I mean, I wrote him a recommendation.

An undated photo of Thomas Gannon provided by Fox News Digital. (Provided to Fox News Digital)

Rosas worked as Phillips’ assistant as a student, and they became friends after she graduated. Gannon had even been to Phillips’ home at least twice, the professor said, once in January for dinner and again during the summer.

Gannon, a divorcee, recently listed the home in Pennsylvania where he was found dead for $550,000.

An undated photo of Sabina Rosas, who was found dead, murdered, Monday, Oct. 28, 2024, at a wellness retreat in Water Mill, New York. (Provided to Fox News Digital)

Gannon’s LinkedIn profile identified him as a small business owner. His former partner told Fox News Digital that the two split more than a year ago when Gannon sold his shares.

“I’m not sure what he did,” he said. “It was a surprise.”

Police are investigating the murder of a woman at the Shou Sugi Ban House in Water Mill, New York on Monday, October 28, 2024. According to police, the body was discovered in a guest room around 12:30 p.m. (Matt Agudo/Instar for Fox News Digital)

A search of Pennsylvania court records showed only one previous encounter with law enforcement — a parking ticket in 2022.

But things changed on Monday after a worker at Shou Sugi Ban House found Rosas dead in a guest room.

Southampton Town police were the first to respond around 12:30 p.m., according to authorities.

The gate remains closed at the Shou Sugi Ban House in Water Mill, New York on Tuesday, October 29, 2024. (Matt Agudo/Instar for Fox News Digital)

When they suspected foul play, they called the county for assistance.

A Suffolk County Police mobile crime lab could be seen outside the main building on the three-acre property for hours on Monday, next to an iconic Buddha statue at the front entrance.

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Police stand guard outside the Shou Sugi Ban House in Water Mill, New York, Monday, Oct. 28, 2024. Authorities launched a homicide investigation after a resort worker found a woman dead in a guest room with signs of of violence. (Matt Agudo/Instar for Fox News Digital)

In a statement, Suffolk Police said the victim met a violent end. Few other details were available.

The spa did not immediately respond to a request for comment.

Rooms at Shou Sugi Ban House cost upwards of $1,000 per night.

Guests at previous events have included Hollywood celebrities such as Gwyneth Paltrow and Kate Hudson, as well as fashion designer Stella McCartney.

Gwyneth Paltrow hosts a dinner in the Hamptons at Shou Sugi Ban House in New York City on August 22, 2024. (Madison Fender/BFA.com/Shutterstock)

It was founded in 2019 by Amy Cherry-Abitbol as the first high-end wellness retreat in the Hamptons, according to Condé Nast Travelerwhose readers have given the destination a top rating in each of the past four years.

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She was inspired by the Japanese concept of wabi-sabi, which the country defines as embracing nature and finding beauty in imperfection.

Cherry-Abitbol partnered Co-founder of Noma and Michelin-star chef Mads Refslund for food, according to the spa’s website.

This is breaking news.