An up-and-coming fashion designer who dressed Lady Gaga and other stars was murdered in her Manhattan condominium with a deadly cocktail of fentanyl and other medications final year, cops and experiences explained Friday.

A neighbor spotted Kathryn “Katie” Gallagher’s keys dangling from the doorway of her apartment on Eldridge Street on the Decreased East Aspect and entered to look at on her  — then found her lifeless human body encounter up on her mattress, a police resource mentioned.

The mysterious dying of Gallagher, 35, was labeled as a murder Friday immediately after the clinical examiner determined that she died from acute intoxication from the put together effects of fentanyl, ethanol and the designer opioid p-Fluorofentanyl.

Kathryn Marie “Katie” Gallagher, 35, was observed dead on July 24.

The promising designer was the target of grand larceny in what detectives believe that could be connected to a pattern of at minimum 26 modern “drug-facilitated” robberies in areas like the East Village, the Decreased East Facet and the Bronx, police sources claimed.

Cops are also probing irrespective of whether Gallagher’s dying is connected to Kenwood Allen, 33, who was arrested in December and billed with murder in the overdose theft deaths of two clubgoers in the Decreased East Aspect, police sources explained.

Allen — who has not been billed in relationship to Gallagher’s death — is allegedly a member of a vicious gang that has frequently drugged inebriated revelers and robbed them. Law enforcement are also looking into whether or not two of his co-defendants are connected to Gallagher’s loss of life.

“They concentrate on their victims leaving bars, presenting medication in some cases, then either by way of drive or when the target passes out, they take out jewellery, revenue, high-conclusion watches and telephones from their victims,” NYPD Chief of Detectives James Essig stated at the time of Allen’s arrest.

Designer Katie Gallagher prepares models backstage at the Katie Gallagher presentation during Spring 2013 Mercedes-Benz Fashion Week at The Standard Hotel on September 6, 2012 in New York City.
Gallagher (left) is survived by her mom and dad and 3 sisters.
Desiree Navarro/WireImage

Gallagher was “a painter and internationally acknowledged manner designer” who opened her eponymous label in New York Town in 2010, in accordance to an obituary published by the Rhode Island University of Structure, Gallagher’s alma mater.

More than the last decade, her perform was highlighted in magazines these kinds of as Vogue, Glamour, and W, and her collections were worn by celebrities like Laverne Cox, Rita Ora, and Woman Gaga. Kourtney Kardashian and singer Rita Ora also dressed in her garments.

Just before her clothing line took off, she labored as a bartender at Flats Fix Taqueria & Tequila Bar on East 16th Street and Broadway in the East Village in 2016,  a employee there informed The Article. 

Fashion designer Katie Gallagher and actress Rosario Dawson attend the grand opening of Watermark Bar on July 24, 2013 in New York City.
Gallagher (remaining) graduated from the Rhode Island University of Design and style.
Bobby Lender/WireImage

It was not apparent how the medicines obtained into her program or no matter whether anything at all was stolen from her condominium. 

Designer Katie Gallagher (L) and model Chrissy Teigen attend the Ocean Drive Magazine Issue Release Party hosted by cover model Hannah Davis during Mercedes-Benz Fashion Week Swim 2014 on July 18, 2013 in Miami, Florida.
The designer worked with A-listers like Chrissy Teigen.
Aaron Davidson/Getty Photographs for Mercedes-Benz Fashion Week Swim 2014

Overview exterior of 139 Eldridge St., mhtn.
Kathryn Marie Gallagher, a 35 year old female lived in building, whoâs death has been ruled a homicide, 8 months later.
The designer was observed dead in her apartment’s bed room.
Robert Miller

A memorial company for Gallagher was held in her home point out of Pennsylvania in August, and a celebration of daily life is scheduled for this Could.

Gallagher’s loved ones released a GoFundMe page to increase cash so the promising artist’s last collection can be done. They hope to current her function in the Major Apple this tumble.

Gallagher is survived by her parents, grandmother, and a few sisters, who were being “so proud of who she was and all she attained in her short but full and wonderful daily life,” according to her obituary.

“Fiercely impartial and sure of her vision, Gallagher followed her have path in life and in style,” a Vogue tribute to her read through.

Further reporting by Natalie O’Neill and Desheania Andrews